What weight oil to run
 

My 92 305 TPI car runs great, hold great pressure, no smoke, leaks, drips or noises. It is time to change the oil. I looked on the cap and it says 5-20 but the car has 121k on it. It has never had synthetic but I'd like to run a good oil. In a couple weeks it is going on a 2400 mile trip so I have to keep that in mind. Thanks for your input.

Re: What weight oil to run
 

i use mobile 1 10w-30, or castrol edge in all my cars, both work great.

Re: What weight oil to run
 

i use 5w-30. same motor but i have 60k on it. thats just wats recommended. since your doing that trip..id get royal purple just cuz ive heard good things about it besides it price. just dont go too thick

Re: What weight oil to run
 

5-20 is good for cold weather and 5-30 wont hurt it, but NEVER put 5-20 in a 5-30 engine. EVER