[Reagan]

I,m sure this has been ask before, but does anyone use synthetic oil ? I did a search and had no luck. I ordered my new short block today and thought about using it ,

 

[broncofreak2000]

Talk to your engine builder, most recommend regular oil during break in period

 

[Andy351]

i ran synthetic blend in mine for a while, but it just seemed to burn it up really quick (almost 1 quart every thousand miles and only 75-80K on the engine). no leaks, no smoke, don't know where it went.:shrug

now i just use regular old 20w50, no probs, except my shitty fram filter blew its gasket this weekend, 300 miles from home.:banghead

 

[81Bronk36]

according to my engine builder dont use synthetic for the first 5,000 miles. after that Redline and royal purple are the best, more common good ones are Mobil 1 and castrol syntec.

 

[Leonard]

i'm thinking of useing it in my rebuild after talking to one of my instructors whose built a bunch of engines says every 3,000 he spins on a new filter and tops off. recently took apart one of them and the thing was spotless.

 

[BARTnRED]

After the break-in period is what I hear, too.
A few of the guys at work use Amsoil and have been happy with it.
I'm leaning toward the Royal Purple myself.

 

[Andy351]

if i was rich, i would use Mobil 1

 

[Bad 87]

The guy I got my truck from ran Mobil 1 in it, and so I have used it for over 3 years now as well. Seems to work great for me, and it seems to stay cleaner longer.. Usually change about every 3500 or so...