So what are most turbo guys running? I recently had engine failure(not sure what, but lots of blowby) which cause me to replace my engine after 6 years of being boosted. I ran mobile 1 synthetic for two years then royal purple for the last 4 years, chainging the oil just when the cluster would alert that an oil change was needed. TOOTALL did the engine swap for me and said that i definatly had oil failure, possible causing whatever failed to fail. So now I'm thinking about running convetion oil and just changing every 3,000 mi. My only concern is possible coking. Any thoughts are appreciated.

 

i run royal purple 15w40 in all my builds, I have never had any issue, but coking will happen with any oil if the turbo is not allowed to cool before you kill the engine. What failed? just wondering how oil failure was determined.

 

Used to have a 3306 Cat that the turbo would stick if you didn't let it cool long enough before shutdown. It ran 24/7 and had auto shut downs on it that would kill it under load if certain operating perameters weren't met. Would have to go in from the air cleaner side and rock the impellar back and forth to free it up. Felt like it had sand in it. Once we got it to turn, it was OK, but you have to think that burned oil that went into the crank case couldn't have been good for anything. The burned oil wouldn't have a chance to go through the oil filter before going to critical engine parts (at least on the Cat, I don't think the oil was filtered after the oil pump but before the bearings). Said all that to say this.....it probably doesn't matter what type oil you're running if you let the turbo "cook" it.

 

A truck that is driven hard should get oil change more often than 3000 miles. I change mine almost monthly.

 

I'm with Tarinitup on this one. I change my oil every 1500-2000 miles. However my truck see's high boost (15+) and been thru a few bottles already of spray. It's also daily driven with over 92,000 miles on it.

Least I can do is keep the oil fresh.

 

on my new motor ive been running napa 10w-40 conventional bottle by valvoline.

been changing it every race or so. its cheap insurance. i do let my truck idle for a moment after a pass as well. however the garret oil/water ball bearing turbos im using are supposdly ok to not have a cool down like standard turbos.

 

and a few members thought me changing my oil every 2 race weekends was an over kill, mind you i work for a refinery and i have the luxury of testing my oil daily

 

very nice

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so are most you guys running turbo timers??

im thinkn of running then greddy turbo timer or the hks one... just to be safe

 

I haven't had time to pull the engine apart and see what really happend yet, but have pulled the valve covers off and everything is dark/black. Not sludge or anything like that just dark. TOOTALL just mentioned that it looked like it had gotten hot and the oil had failed.

 

I think being boosted you should go a max of 3000 no matter what oil. Like most people are saying...doesn't matter brand or type. Just keep it changed! Boost means more fuel... some of that fuel will make its way into the crankcase. And you don't want fuel diluting your oil. I am not turboed but I run 3k miles castrol conventional. But i'm only at 8lbs. But when it gets worked or lots of towing I will go 1500-2000 miles between oil changes. She does have 87,000 on the clock.
A turbo timer couldn't hurt either.