I'm guessing syndealer is an oil salesman....but here is what I use:

valvoline 5W-20 in my 10' 5.7 ram.
rotella 15W-40 in my 00' 318 ram.
valvoline 20-50racing in the Iroc.
castrol 20-50 in the 67 mustang.
Castrol 20-50 in my race bike, sometimes I'll use 10-40 in the winter, but in tucson, there isn't much of a winter. The bikes get changed every 1.5-2.5 hours of run time due to fuel dilution, and clutch disc fibers.

 

just found out my dd burns a quart of oil every 1k, so its going to go to 10-40 next oil change

 

lol im so sales rep or anything like that. I just get told which oils i should use and they very back and forth so just wanted to see if there was a general opion on it.

 

This site has everything you could ever want to know about oil. Bob Is The Oil Guy - Forums powered by UBB.threads™

 

i have a better question, how come a substance that GETS THINNER WHEN HOT, is considered to be thicker when heated??? If someone that works or has expierence in the multi-grade oil trade could please anwser this question i would be very happy. I am going to use penziol 30w detergent. I would like to run non-detergent but hydrualic lifters don't agree with it. not 5w-30, 30w

 

It's because of the viscosity enhancing additives that are put into conventional oils (not synthetic). The description on how multi-grade oils work starts on page 2, but read it all, it's pretty informative: http://mysite.verizon.net/oldhokie/windyridge/oil.pdf

 

because if you run a straight weight, it thins as it gets hot. multigrade will have the consistancy of 5 weight when cold (thats what the w in 5w-30 stands for, winter i.e. cold), but at 180-200 degrees when the engine is hot, is has the consistancy of 30 weight oil to keep oil pressure up. very simple, just read the bottle