What kind of oil for oil change

[motorsports_3]

In my 87 325 i bought mobil one red top 15w 50. Is it ok for me to put it in, being that it is synthetic ?

[Mark_In_PA]

i used it once and didnt like it. i run castrol syntec blend. since you are in miami you should just run the syntec blend 20w-50 all year round.

[KenCopperwheat]

I'd run full syn. If your seals are in good shape, you won't have any leakage problems.

I run 5w30 AMS full synthetic in the winter and I don't leak a drop.

[L8APX]

Your wasting money on synthetic unless you run the car under heavy loads or at high RPMs for a long time. Valvoline 10-40 is fine.

[motorsports_3]

How would i know if my valves are in good condition. Doesnt synthetic help quiet valves... and all that other stuff. I have an eta, i cant even hit high rpms.

[ultima_chi]

Well he meant high rpms for the car that you are currently running.....

[MR 325]

Valvoline 20w 50 would be perfect for your car and location. I am in SoCal and that's what I run in my car. Valvoline rocks. I have heard once you put synthetic in you shouldn't switch back to regular motor oil, but I can't confirm this.

[motorsports_3]

So now i am confuese... Is it all right for my engine to use synthetic

[92 e30 cabrio]

I know that in a hot enviroment like Southern California, people find 20-50 to be perfect for the M20. I use 15-40, only because thats what the shop I take the car to has.

I was told not to use synethetic oil because at higher RPMs, the oil would leak right past the seals.

[bimmerdremer]

I ran synthetic once and I didnt notice any difference in the car. I did have some leakage though so I whent back to vavoline 10-40 conventional. From what Ive heard running synthetic in cars like ours is just a waste of money.

[motorsports_3]

Why is running synthetic in our cars any different. ALso what oil is better for my car mobil 10w 40 or valvoline 20w50. Is castrol any good?

[chandler]

regular castrol 20w-50 year round change oil/filter every 1500-3000 miles

[motorsports_3]

Thanks. Well today i changed my oil with castrol gtx 20w 50, high milage, and a k&n oil filter. Everything went well. Thanks guys.