Houle #382
Well-Known Member
Anyone running Mobile 1 15 W 50 in their 440's
I use Rotella in my Kenworth.Rotella 15w-40
According to Mobil1, the 15W-50 has 1300ppm of zinc made for flat tappet applicationsDon't use Mobil 15W 50 that without cam protection additives. Better to not use it at all.
Depends on what cam you're running...and which Mobil1 15-50 (there's more than one).Anyone running Mobile 1 15 W 50 in their 440's
Rotella 15w-40
I read his stuff years ago. Some people praise him, others take pot shits at him. Seems like he does alot of homework if you ask me.Diesel oil is not a very good oil to run in high performance cars, I use to run it until I came across an article written by a retired Engineer. This guy goes by 540Rat and his extensive testing of all brands of oils shows which oils have better wear resistance than others. You will be shocked at what brands did not fair very well. If you have time his web site is, 540ratblog.wordpress.com when it opens look for 540 rat-tech facts. It's long but worth the reading. Hear is one thing he has to say about Shell Rotella.
The PSI rating is how well the oil resist wear, anything over 90 psi is excellent, Mobil 1, Valvoline, Amzoil and a couple of others all rate very high
78. 5W30 Shell Rotella Gas Truck motor oil, synthetic, API SN Plus, GM dexos1-Gen 2 = 96,269 psi
zinc = TBD
phos = TBD
moly = TBD
This oil was tested Spring 2019.
Immediately below is a comparison of how the previously tested Traditional Heavy Duty Shell Rotella T Diesel oils compared to this Gas Truck oil:
15W40 “NEW” SHELL ROTELLA T Diesel Oil conventional, API CJ-4, CI-4 Plus, CH-4, CF-4,CF/SM = 72,022 psi
15W40 “OLD” SHELL ROTELLA T Diesel Oil conventional, API CI-4 PLUS, CI-4, CH-4,CG-4,CF-4,CF,SL, SJ, SH = 71,214 psi
As you can see, the new Shell Rotella Gas Truck oil provides MUCH HIGHER wear protection capability than the Shell Rotella T Diesel oils tested previously. This is further proof that Traditional Heavy Duty Diesel oil is NOT a good choice for High Performance gas engines.
540 rat, is always updating his site with all the newer ( lighter ) oils that are coming out on the market and it's surprising that some companies that make these specialty oils for the older cars are not really that good in respect to wear resistance, yes they have zinc in them but to much zinc is not good either. It takes more than just zinc to make oil wear resistant. Mobil 1, Valvoline, and Amzoil all seem to have very good wear ratings along with a few others. Some specialty brands do not fair very well in the wear resistance but after adding a additive the wear resistance goes way up so why spend big bucks on oil then have to add an additive, just buy the highly rated oils. I have been using Valvoline 10/40 high mileage oil or Amzoil 10 W 40 which both are rated extremely high for wear resistance and I have never had a problem.I read his stuff years ago. Some people praise him, others take pot shits at him. Seems like he does alot of homework if you ask me.
That's a sweet KW.My old 86 lived on it also.
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I must ask, what was under the hood and cab?My old 86 lived on it also.
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Anyone running Mobile 1 15 W 50 in their 440's