In Reply to: winter oil, summer oil... posted by brandon on August 29, 1999 at 21:28:35:
: quick survey of what oil all of you run in the summer and winter. ANY comments are helpful.
: i have my own ideas about oil but i want to know what is out there. currently i am running Valvoline 20W-50 in the summer, and i ran that last winter, but i am thinking of going to a 10W-40 or 15W-40 for this winter. i always change every 3000-3500 miles.
: also, i was wondering if anyone knows about the detergent properties of Valvoline All climate. i run it in both my bimmers, and they seem to like it. i have a 79 320i with 260,000 (!) and my 85 535i has 160,000. i want to keep the thicker oil in the 320, but in the 535, it's been very well maintained all it's life, and the engine is nearly factory tight. oil comes out nearly clear, but the engine is pretty clean. do you think the Valvoline is high enough or too high in the detergent factor?
: another random question: what is the largest size TRX 390 tire available, and does it come in all speed ratings?
here's the poop. 20/50 castrol gtx, the finest oil you can run in your bmw.period.exclamation point.i worked at a southern dealership for quite a few years, we tried several different oil companies, you know whoever will let them make the most money and all. we saw cars coming in with stopped up cam spray bars, worn out cams, etc. this dealership also was a volvo dealership, and had volvo's that siezed the cams, burnt up turbos, etc. this was on quaker state, pennzoil, and if i'm not mistaken they even tried valvoline. they finally had a discussion with one of the district service reps about the problems they were having. he suggested castrol, and told us a little about the product. he was not getting kickbacks, and would do him no good to lie to us about it, since he was footing the warranty bills, buying goodwill claims, etc. come to find out castrol buys bulk oil refined. they can buy it from any manufacturor. they _D_O_N_T_ refine their own oil. they do some magic to the oil they buy, add their gtx additives, and viola good stuff. i've been doing this type of work for a good while now, and swear by the stuff. i haven't had an engine failure in ANY of my customer's cars in over 10 years, and this is all i use. ***except in my own car. what am i a hypocrite? no i have a very hot turbo car, that i started on mobile 1, suggested to me by a big turbo nut, so i decided to see what would happen. i am thus recording history on mobile 1 synthetic. and to this point i am pleased.