And as I said, g-load should not be a factor in an engine's viscosity choice. If you have an oil pick-up problem, solve the pick-up problem.
A_Harman said:nleksan said:I think we just disproved Dr Haas's theories in this post.
fwiw, i would totally have been thinking 0W-40 was ok with a car like that.
A 0W-40 like M1's is perfectly fine if the oil temp's are contained. It is a very common oil choice for E36 and E46 Bimmers at the track, M3 or otherwise.
Due to it's high 185 VI it's a very practical oil at most track day events since most drivers don't have the patience to wait
for the oil to come fully up to temperature before extracting full performance from their cars. And since most track sessions are no longer than 20 minutes high oil temp's are not often a problem even on a hot day.
Ali Haas' theories have not been disproven in the slightest.
Driving high performance cars on the street simply cannot generate the oil temp's that you can on the track.
He never sees oil temp's in excess of 100C in any of his cars and the Enzo max's out at a rather tepid 82C.
yes they have, slightly, in one respect..... and that would be: can you explain to these people how Dr Haas's (he is in the minority in income, driving style, choice of cars, to 99% of America, he says he uses his cars for no more than 10-15 minutes at a time) motor oils that he says are 0W-20 and 0W-30 are actually more like mid-30 for the 0W-20 and low-40 for the 30 if going by HTHS and not the labeling of the oil?
OP, in post 1, commented on very high oil temps with one oil and not another. I think that is why BMW spec'd the thick oil in the first place! But back to Dr Haas, did you yourself not say that they oils he calls 0-20 and 0W-30 are in fact that "in name only" and are what the general public that reads this site would actually be calling closer to a 30 and 40 weight, respectively?
Most people with an Enzo would be using it -slightly- hard and maybe getting the oil up to "normal" temp. Dr Haas has a driving style he himself says is less common. So, being so quick to say EVERYONE can do what he says.. thats the run with me. It gets back to "As thin as possible but as thick as necessary" but you yourself said that Dr Ali E haas "exaggerates."
Right?
That would sure clear up a lot. it seems to be a sticking point.
As to the M, you are right i think the manual specifies "0W-40, 5W-50, or 10W-60 depending on condition." You have also said that Redline 5W-30 is a good choice. Well, why not Redline 0W-30 then? I dont fully understand why the "0" would not be ok, unless the 5W-30 is actually thicker than the 0 in that line of oil. Would you really put 5W-30 Redline in that car and then take it to the track for a DAY on the track? This isnt a rub on you specifically. Just curious.
A lot would choose the 10W-60 for that same application.. I know you said Redline 5W-50 is thicker than it but some people run that too...
I have never taken a car to a track but i have pushed my BMW hard and i used to put either 10W-40 or 20W-50 in mine to handle the temperature. 100 degree Summer says tend to always have the best weather to push the car. 110, 120MPH... trackLIKE sure but then i drove for hours that day as well.. all day, actually.. turned the car off at 8PM or later was driving since early morning.. HOT day. If i had the car again i would choose from 0W-40, 5W-40, 5W-50, or 10W-60 (or the 0W-40 or 5W-50 Redline.) Unless i can be convinced....