Originally Posted by Azrael
Originally Posted by Snowy_Astra
I always run 10W 40 semi, its much better at high constant revs (constant 140mph) i found fully synthetic to thin out like water and loose a lot of its lubricating properties (dab of oil between fingers and rub, felt more like glue)
Kind of strange way of thinking. I can assure you WRC cars are constantly high reved and they run fully synthetic. E.g. works Impreza WRC runs Motul 300V Chrono 10W40
http://www.motul.com/motulbaseuk/gab_fiche2.asp
Yeah, but look at the oil system: Dry sump, huge oil coolers, etc etc
All i got is a half litre oil cooler, plus running semi sticks to the inside of the engine better.
This is just personal experiance on my part, fully synthetic is that bad in my engine that after a hot fast run i pull the dupstick out and the oil doesn't even stick to it, its just bare and unlubricated.