quote:
I know when I used D1 in my 1.8L Toyo, it felt sluggish. M1 10w-30 is their best grade on the shelf. [/QUOTE ]
Buster, you're actually trying to equate a 1.8L Toyo to a high performance turbo engine ran in high ambient temperatures? Are you kidding?
And maybe you can explain your scientific method for proving that 10w-30 is Mobils best weight of oil.
Eddie said:
If the factory recomends 10w30 synthetic (M1?) then that's what the engineers prefer. Too much self appointed experts saying too thick or too thin without ANY data to back up the statement. Go with your manufactures recomendation (owner manual is your unbiased friend)
Eddie, I highly doubt the factory engineers ran consecutive simulated engine tests with different weights of synthetic oil to find which provided the best overall protection (lowest wear of all internal moving components under all possible operating conditions). I think simply the 10w-30 being of a relatively thin weight helped the car/company meet CAFE standards. I personally would prefer a little more film thickness with a turbo engine; especially in desert heat under hard driving conditions; that's all. That's why I thought A 50-50 mix of M1 10w-30 & 15w-50 might be a good idea; especially with the 15w-50 having more anti-wear additives.
True, I don't have any data to prove I'm right just like you don't have any data to prove I'm wrong. I'm just stating my opinion based on gut feel.
And I never claimed to be an expert!
I stole this from another post; I beleive the info was provided by MolaKule.
quote:
What vicosity would be required at 100C (212F), 5.25 cSt SAE 5-20
125C (257F), 5.25 cSt SAE 30
150C (302F) respectively? 5.25 cSt SAE 40
The above are considered minimum viscosities at the temperature specified as per an SAE/GM paper on minimum lubricant films in engines.
Notice it says MINIMUM lubricant film. I personally rather not be on the low end of the viscosity range. 5.25 cSt seems awfully thin.
Steve
Edit: somehow my quote bars got messed up.
[ June 27, 2004, 04:15 PM: Message edited by: 69 Riv GS ]