So I just replaced the timing cover gasket, and upper and lower oil pan gaskets. My car has 122k miles and is driven fairly hard, would you guys recommend a synthetic oil and if so which one? I have been using valvoline 10-30 high mileage up until now. If all goes well I won't have any leaks but I just don't want to get any blow by due to the oil change. I need some help on this one, I really have no experience with oils...

 

Synthetic is most likely your best option. It protects the best. Just go with some Mobil 1 synthetic, and check out the oil thread that someone just started. You can browse what others are using. Mobil 1 synthetic is just my personal preference

 

We have a fluids discussion forum. Go there. Thank you.

 

i heard about the syntec castrol oil it says unlock the horsepower is that good as the mobil 1 i just want the best for the max.

 

I just bought mobil clean7500 5w30 tonight and a bosch filter(all the mobile and k&n were gone) It is a synthetic blend so I guess only time will tell now.