i've been using mobil 1 since i got my jk in 07 but can never find the 5qt jug anywhere in 5-20 only quart bottles so i saw castrol syntec 5-20 and purchased it, anyone have any comments on this oil? good or bad?

 

Been using it since my first oil change and very 5-7k after that. Seems to hold up well meaning the old oil doesn't look like 'old oil'. I really don't have anything to compare it to, but I have not had any problems. Hope this helps. PS I just recently noticed it in the 5 quart jug.

 

Have you gone to WalMart? They always have the Mobil 1 5-20 5 qt jug where Im at.

 

I use the Valvoline Full Synthetic 5w-20.

 

Are we talking about Castrol or Valvoline.

 

my walmart never has it and it pisses me off so i opted for the castrol syntec and its cheaper too...

 

I have a ten year old truck that I have always used syn oil in but i buy the syn oil thats on sale whatever it is and the truck runs like a champ. I havent switched over to syn in my jeep ye, not enough break in miles on it.

Personally I don't think theres a differnce in syn oil, buy whats on sale just my two cents.