mak89

iTrader: (6)

Need your guys opinion. New to me 07 AWD gs350, 120K miles, car is located in South Florida, good weather year around.

I'm planning on using 5w20, Amsoil synthetic. Not sure what is currently in there. Should I be concerned with oil leaks caused by 5w20 thin oil viscosity with such mileage??

Input from FL gs350 owners with +100k miles appreciated.

XxGoKoUxX

You should be fine.

I use 0w-20 (Redline oil) on my GS430 and I have zero leaking issues, 120k mi also.

mak89

iTrader: (6)

Thanks for input. I actually read a lot of your threads and praise of redline. It was between redline or amsoil, appears redline is superior based on research but got a good price on Amsoil.

ez12a

I use any big brand name synthetic 5w-20 (not high-mileage type) that's on sale (excluding store brand oil). Valvoline, Pennzoil, Castrol etc. Currently at 122k miles, bought at 89k and havent had an issue. Burns barely any oil.