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Forum: Engines and Propulsion Systems 20-09-2017, 14:23
Replies: 64
Views: 10,680
Posted By a64pilot
Engine Oil Change Frequency

GM years ago came out with a brilliant oil change methodology.
It's called GMOLS or GM oil life system. Basically your car computer tracks it. You start out with new oil and say 1000 points, every...
Forum: Engines and Propulsion Systems 18-09-2017, 17:06
Replies: 64
Views: 10,680
Posted By a64pilot
Engine Oil Change Frequency

It's TBN, which is an acronym for "Total Base Number" that is the ability of an oil to neutralize acid, it often is what determines when an oil needs to be changed, or when its soot loaded. Good oils...
Forum: Engines and Propulsion Systems 18-09-2017, 17:00
Replies: 64
Views: 10,680
Posted By a64pilot
Re: Engine Oil Change Frequency

Many road Diesels are the same, and as often as not they are really oil heaters, except of course when the engine is running hard, then they are coolers, but running around empty and idling they are...
Forum: Engines and Propulsion Systems 17-09-2017, 16:25
Replies: 64
Views: 10,680
Posted By a64pilot
Re: Engine Oil Change Frequency

Let me clarify what I was trying to say.
By all means do not change your oil less often than the manual says, and use an oil that as a minimum meets the stated requirement. With older engines like...
Forum: Engines and Propulsion Systems 17-09-2017, 07:51
Replies: 64
Views: 10,680
Posted By a64pilot
Engine Oil Change Frequency

Not necessarily, reason is several fold. Many engines service recommendations are made not to give the longest possible life, but to ensure it makes it through the warranty period and to not overly...
Forum: Engines and Propulsion Systems 16-09-2017, 08:40
Replies: 64
Views: 10,680
Posted By a64pilot
Re: Engine Oil Change Frequency

I ran only Rotella T6 in my Duramax, it was a real hot rod for a Diesel. Boost turned up to 32 lbs and fuel too of course, made over 400 HP I'm sure.
However for a NA Marine Diesel like my little...
Forum: Engines and Propulsion Systems 15-09-2017, 16:35
Replies: 64
Views: 10,680
Posted By a64pilot
Engine Oil Change Frequency

I change oil in everything with an hour meter at 100 hours, except airplanes, they are 50 if they have an oil filter and 25 if they don't.
I threw the airplanes in there to try to show that 100...
Forum: Engines and Propulsion Systems 07-07-2017, 15:29
Replies: 64
Views: 10,680
Posted By a64pilot
Re: Engine Oil Change Frequency

Average modern automobile engine's oil temp runs above 200F, usually a little more than the coolant, a lot of performance cars run oil coolers that cool oil with engine coolant, the coolant is of...
Forum: Engines and Propulsion Systems 07-07-2017, 15:25
Replies: 64
Views: 10,680
Posted By a64pilot
Engine Oil Change Frequency

Zap the oil filter with an IR temp gun, I bet it's hotter than you think.
If not, then you need to run it harder to get it up to temp every so often. Piston aircraft should be run at 180F, idea is...
Showing results 1 to 9 of 9

 
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