Category Archives: sae 40 oil vs 15w40

Sae 40 oil vs 15w40

By | 25.05.2020

Please login or register. Full Member Offline Posts: Oil Advice SAE 40 vs 15w Seems that a lot of you guys use 15w40 or similar and see a lot of good recommendations on Brad Penn. My engine builder recommended using straight SAE40 as he said the has loose tolerances when compared with other motors and will flow oil nicely. Knowing that you guys run a lot of s and all, wondering if you guys have any concerns over an SAE 40 not lubricating well when the motor is started cold.

Seems that the 15w40 would protect better during the first few minutes when starting. The Charger will always be in the garage, so starts shouldn't be below F degrees worst case. Engine is street w 9.

Maybe use SAE40 during summer and 15w40 over winter? Thanks, Terry. Old Timer Offline Posts: 40, The Brad Penn will do fine without an additive. I always run a multi-grade oil in mine and I haven't had any issues. Did your builder make it extra loose or something?

sae 40 oil vs 15w40

Senior Member Offline Posts: I have allways used a dedicated break in oil in a mono 30 for the first Dumped it after initial break in then refilled with the same. I then switch to a 20w50 in a brad penn grade 1. This is with a flat tappet, others may recommend different with a roller. An important thing to do prior to first start up is prime the oil system. My builder didn't do anything different just said tolerances weren't as tight back thenbut just said he recommends SAE 40 in all of his muscle car engines because they've compared the bearings on side-by-side motors and the 10w30 had the worst wear, and SAE 40 had the least.

Maybe I can just mix in some 15w40 with the SAE40 when going into winter. Cold oil pressure is 75psi and drops to at hot idle. Main and rod bearing clearance set at.

Mine turns over fine in sub zero temps. Old Timer Offline Posts: 2, Powered by SMF 1. April 17,PM. Welcome, Guest. News : DodgeCharger.Engine oils are generally formulated oils. They consist of mineral, semi- or fully synthetic base oil base stocks plus a varying number and amount of additives. The quality of an engine oil depends on the base stock and its properties as well as on the additives. The main requirements for an engine oil are defined temperature-viscosity properties, protection against wear and corrosion, keeping the engine clean, holding particles like soot or abrasives in suspension, yield strength under compression and many more.

Temperature impacts the flow properties of engine oil. Engine oil is available in different SAE grades to suit the climate where it is used and the purpose of the user. We use cookies on our website. Some of them are necessary e. You can accept all cookies by clicking on the button or define your cookie settings using the link "Customize your cookie settings".

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Home Wiki Engine Oil. Viscosity of Engine Oil. Description Engine oils are generally formulated oils. Viscosity [mPa. SAE 10W SAE 5W SAE 0W SAE Engine Oil SAE 30 - kinematic viscosity and density over temperature. Cookie settings We use cookies on our website.

Cookie settings Here you can find an overview of all used cookies, get detailed information, and decide which cookie types to accept.Discussion in ' Trucks [ Eighteen Wheelers ] ' started by freightlinermanJun 17, Log in or Sign up.

Find Trucking Jobs. Jun 18, The comparison between a SS and 40 weight was simply to state the fears of people trying something new. It was a comparison of a negative item on a Super Single not being able to limp it to using a different oil engine failing. I'm sure there are many people that have used SAE 40 instead of 15W Again, all I wanted to see was the wear number from an oil analysis to compare.

If no one want's to volunteer, that's fine. Someone posted 15W40 has been proven, I've yet to see any proof in comparison which is why I posted this thread. You're right, this post does have very little information which is why I simply wanted to get more. I'm not sure where all this negativity is coming from.

Straight SAE 40 VS. 15W40

Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided. There is no charge for this service, but standard message and data rates may apply. Jun 19, In the winter at about 10 degrees or less 15w 40 was harder to pump and slower pumping than straight 40 explain that.

Another thing that might be gaining you some grief is why would you mess with something that works. The newer engines have to have CJ-4 oil anyways, I don't think there is any straight weight oil that meets these requirements.

sae 40 oil vs 15w40

SmokinCATJun 19, Jun 20, Let me answer a couple posts here. SAE 40 is thicker when cold than 15W40, which is why it is thick.

What Is the Difference Between 10W30 and 10W40 Engine Oil?

I will be posting an oil analysis shortly from my 8v71 that had 15W40, it had fuel dilution of 6. Also, it would have been a better idea to ask. Not everyone thinks alike or thinks to ask a simple question.

True too on the CJ But, wasn't CJ-4 for or and up models? Two stroke Detroits fire twice as often as a four stroke engine and two stroke Detroits have a short stroke in comparison to other engines being used. Jun 21, Last edited: Jun 21, Nov 26, I am very lost here. I wanna put straight SAE 40 Oil in it. An MCI endorsed mechanic recommends highly I put in 15w40 and so does a good friend of mine.

Straight SAE 40 VS. 15W40

Everyone online says to do the 40 weight. I gotta make a decision on this by tonight. This is my first post! Thanks for your knowledge and experience!

Your engine requires an sae 40 oil. On a two stroke there are no advantages I know of going to 15w40 except cold starts.Discussion in ' Lubrication ' started by Garrie DennyMay 30, Log in or Sign up. Heavy Equipment Forums. Thank you for visiting HeavyEquipmentForums. Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page.

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Welcome to HeavyEquipmentForums. I need to get some advice re oil to use. My old fiat 70ci states to use SAE40 oil in the sump, my question is will sythethic 10w be all right to use in its place rembering this dozer is approximately 50 years young, any onewith semi-proffessional and knowledge would be really appreciated, thanks, Garrie. Garrie DennyMay 30, As long as it doesn't have a two stroke Detroit in it, multigrade oil would probably be suitable.All Rights Reserved.

The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply. Hottest Questions. Previously Viewed. Unanswered Questions. Oil and Oil Filters. The Difference Between. What is Difference between 15w and 15w oil? Wiki User Therefore the 15w being the lower Viscosity means it will flow fast then the 15w when the oil is hot.

Asked in The Difference Between What is the difference in 20w 40 and 15w40 motor oil? Only the weight of the oil, 20w 40 is thiker than the 15w40, 20w 40 is the best oil for the old cars although 15w40 is very easier cold start Asked in Oil and Oil Filters Whats the difference between 10w40 oil and 15w40 oil?

The main difference between 10W oil and 15W oil is that 15W oil has a higher viscosity than 10W oil.

Start up oil comparison 5W-30 vs 15W-40

Asked in Dodge Ram What kind of oil for a Dodge 6. Asked in Oil and Oil Filters What is the difference between 15w40 and 11w40 oil? Never heard of 11w Would have slightly thinner cold properties that 15w Second Opinion: I've never heard of 11w40 either. As far as I know there is no such thing. Make sure it's oil specifically for diesel engines Asked in Oil and Oil Filters Can you mix 15w40 motorcraft motor oil and mobil 15w40 motor oil for use in a farm tractor?

Yes, you can mix conventional oil with synthetic oil with no problem. Rotella 15w30 diesel engine oil. Asked in American Cars Oil capacity for international dt? It takes 15 quarts of 15W40 diesel oil I highly recommend Rotella 15W Any SAE aprroved motor oil is fine. Ususally I run 15W30 in a unless I am in a really hot climate. Then I would use 15W All SAE oils found at any auto parts store meet or exceed manufacturers specifications.

I personally like Valvoline. Any basic oil, depending on your preference. I also recommend on an older tractor that isn't in use much or hasn't been tuned to use slick 50 oil treatment.The oil in your car is pumped through the engine when it's running, protecting it from mechanical wear.

Oil is sold in a variety of "weights," usually expressed as xWy. The difference between 10W30 and 10W40 oil isn't too big, but to understand it, you'll have to understand a few basic things about fluid viscosity and the behavior of oils under different temperatures. The numbers in a name like 10W30 refer to an oil's "weight. Lower weights mean a thinner oil; higher weights mean a thicker one. In a car's engine, a thinner oil is more useful at first, when the car's just started and the oil must flow quickly through the engine.

But as the engine heats up, a too-thin oil can be a problem.

10w-40 versus SAE40

The viscosity of a liquid like motor oil varies with temperature. As the oil heats up, it becomes less viscous and flows more easily, thanks to the increased motion of the molecules making it up.

Since oil runs through engines and therefore heats up all the time, it will constantly change its viscosity, and this needs to be taken into account when buying or categorizing oil.

The change in viscosity with temperature presents a problem: since you want a thin oil when the engine is cold, but not a too-thin oil when it's hot, how do you find an oil that won't thin out too much as the car runs?

Multi-weight oils, like 10W30 and 10W40, contain long-chain polymers that expand and contract with temperature changes, altering the way the oil behaves. In this way, an oil can be thin to begin with, but not as thin at higher temperatures than its original viscosity would suggest.

In the weight measurement of a multi-weight oil, the number before the W expresses the oil's weight in cold conditions, and the second number its weight at temperatures of over degrees Centigrade.

Multi-weight oils are still thinner when hot than they are when cold, but a 10W30 oil, for example, will only be as thin when hot as a weight oil, whereas it will be as thin when cold as a thinner weight oil. Both these oils have the same weight when cold, and it's a good weight, sufficiently low to get the oil moving through the engine quickly.

A weight of 30 when hot is very common, and ideal for many engines -- but if you're having problems with engine wear or leaks, the 10W40 oil will provide more protection for a running engine, and escape through leaks more slowly.

This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Works, contact us.

Multi-weight Oils The change in viscosity with temperature presents a problem: since you want a thin oil when the engine is cold, but not a too-thin oil when it's hot, how do you find an oil that won't thin out too much as the car runs? Notation In the weight measurement of a multi-weight oil, the number before the W expresses the oil's weight in cold conditions, and the second number its weight at temperatures of over degrees Centigrade.

About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. Photo Credits antique oil can image by studio vision1 from Fotolia.Discussion in ' Trucks [ Eighteen Wheelers ] ' started by freightlinermanJun 17, Log in or Sign up. Find Trucking Jobs. Jun 17, 1. I read an interesting post regarding the use of straight SAE 40 vs 15W40 in 4 stroke engines.

Apparently, the use of straight 40 provides better lubrication and wear protection. The only down side would probably be the thickness in the winter time. Has anyone here ever experimented with straight 40 in their 4 stroke Series 60, N14 or ?

If someone could do this and send in an oil analysis to see how your engine wears compared to a 15W40, that would make an interesting comparison. From what I can gather, both oils are 40 weight at operating temperature. Since it is summer, if someone has done a past oil analysis with 15W40, would you consider running SAE 40 for one oil change and sharing your findings with the forum?

Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided. There is no charge for this service, but standard message and data rates may apply. Jun 17, 2. It's already been done and proven, in four strokes is the ticket, straight 40 in detroit two strokes.

No need to reinvent the wheel at such high cost to the little guy. Jun 17, 3. Thanks for the info, while 15W40 may be the ticket I'm still very curious to see results on paper. I would just be curious to see how fuel economy and wear patterns change. If there is one volunteer out there, that would be awesome.

The only negatives I could see would be increased wear to an engine.

sae 40 oil vs 15w40

I enjoy learning new things, reading others opinions and studying fact. I know you're not arguing and I'm not trying to argue with anyone either, but just stating what my purpose of this post was. If you know the location of any literature showing wear comparisons in a 4 stroke engine using 15W40 and SAE 40, I would like to see. If you look at the link below, there are pictures show the wear differences to various engine parts on a 2 stroke Detroit.

I could NOT find anything showing testing in a 4 stroke engine, which is why I was asking if anyone wanted to volunteer. Testing used 15W40 in one engine and SAE 40 in another.


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