Would 5W-40 benefit me?

[bigbluecow]

I was dead set on buying some 5w40 until I read all the treads i found last night. I even had O'reilys order me 2 cases. From what I have read and understand the only way the 5w40 would benefit me is if I were living in -0 weather or towing a lot. I do not tow at all and it rarely gets below 30 degrees here(FT Bragg, Nc). I also heard you sacrifice lubrication when going to a 5w40. So the question is would I be ok with a dino oil?

Thank you

[TooMuch03]

Regardless of the weight of the oil, synthetic oil is a must for a 6.0, dino oils contain paraffin that can cause issues with the HEUI injectors, and synthetic oils also dissipate heat faster which will help extend the life of your turbo.. I have found that synthetic oils are more common in 5W40. In warm weather, and at operating temps, 5w40 will perform exactly like 15w40. The only difference is in cold weather and cold start ups.

[JWhelan2787]

Good to know! Which brand do you recommend? I am getting ready to order some Mobil 1 5W40 unless anyone here has found another brand that is more preferable.


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[strokin6L]

you wont sacrafice lubrication with 5w-40. It's the best thing you could do for your truck. You'll find that your truck will start better and idle better i bet. Any 5w-40 synthetic will work. I've tried Schaeffer's, Rotella, Valvoline Premium Blue Extreme, Mobile 1, Royal Purple and Amsoil. They are all good, but i would most definitly use 5w-40 over the dino oil. Your injectors will be better off with it. Heck there's guys running 5w-40 in hotter climates with no issues.

[risco]

Originally Posted by strokin6L

you wont sacrafice lubrication with 5w-40. It's the best thing you could do for your truck. You'll find that your truck will start better and idle better i bet. Any 5w-40 synthetic will work. I've tried Schaeffer's, Rotella, Valvoline Premium Blue Extreme, Mobile 1, Royal Purple and Amsoil. They are all good, but i would most definitly use 5w-40 over the dino oil. Your injectors will be better off with it. Heck there's guys running 5w-40 in hotter climates with no issues.

so in your opinon what the best or what did your truck run best with

[ebusa]

I run Mobil 1 5W-40 Turbo Diesel Truck full synthetic and it's great! Good price at WalMart and you can get the Motorcraft FL2016 filter there too.

[windrunner408]

Originally Posted by strokin6L

you wont sacrafice lubrication with 5w-40. It's the best thing you could do for your truck. You'll find that your truck will start better and idle better i bet. Any 5w-40 synthetic will work. I've tried Schaeffer's, Rotella, Valvoline Premium Blue Extreme, Mobile 1, Royal Purple and Amsoil. They are all good, but i would most definitly use 5w-40 over the dino oil. Your injectors will be better off with it. Heck there's guys running 5w-40 in hotter climates with no issues.

Yea I live near Memphis TN and it gets balls HOT here. Yesterday it was 86*F out and will most likely be like last summer where the temps reach over 100*F every day for over a month and I use Amsoil 5w-40. It is expensive but this stuff works really well and provides great starts even in cold temps. I have also started adding Archoil AR9100 oil additive so I can see how it does next winter.

I agree and wouldnt hesitate at all to use 5w-40 over 15w-40 at all as long as it is synthetic.

Originally Posted by risco

so in your opinon what the best or what did your truck run best with

This is purely my opinion based on the info posted by Amsoil but when I bought my truck back in 2006, they were the only company that I could easily find synthetic diesel oil from so I started using their oil since the first oil change my truck has ever required and I have stuck with them. Since then the other oil companies have followed suite and now make synthetic diesel oil. In My Opinion, Amsoil is simply the best you can buy.

[strokin6L]

out of all the 5w-40 oils i've used....the truck ran the same no matter what 5w-40 was in it. There wasn't one that acted better than the others. So it just comes down to price or preferrence IMO.

[PGreenSVT]

Well in the hierarchy of things Redline Oil would be the best. It is a Group V Polyol Ester based true synthetic engineered for turbo jet and helicopter engines. It has the best heat handling capability and will keep your engine cleaner than any of the others. At $45.95 per gallon not many can afford it.

Next would come Amsoil and Mobile 1 which are Group IV PAO based true synthetics and are much more affordable.

The rest that claim to be full synthetics are in fact Group III based oils derived from severley hydrocracked dino oil and synthetic in name only as far as I'm concerned. They are cheaper to make and still contain small amounts of paraffin and aromatics (****roach and other organic trash).

I run Amsoil 5w40 and have run their 5w30 as well. I would love to run the Redline but sadly my budget won't accommodate that wish.

Whatever you decide to run, a synthetic 5w40 is better for your engine than any weight dino oil.

[windrunner408]

This is true. Forgot about Redline.