xpost - running in after rebuild
#17
Rennlist Member
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Originally Posted by reno808
I use castrol GTX 20-50
#18
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I use Mobil 1 20w/50 for years in my 924, 944, 951 and BMW 530I. No problems to report. and it keeps the inside of the engines clean.
Also to break in the engine, I go to my favorite empty road, and I do 13-15 full load runs at low boost 2-3 psi. From 20 mph to about 55 mph in second gear. After every run, I let the engine vacuum slow the car down to 20 and then I do it again, antil I reach the target nember ot times.
regards,
AL
Also to break in the engine, I go to my favorite empty road, and I do 13-15 full load runs at low boost 2-3 psi. From 20 mph to about 55 mph in second gear. After every run, I let the engine vacuum slow the car down to 20 and then I do it again, antil I reach the target nember ot times.
regards,
AL
Last edited by AL951; 12-27-2006 at 08:07 PM.
#23
Burning Brakes
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Originally Posted by thingo
Synthetics are optimised for the demands of the motor industry, low emisions, fuel economy and infrequent oil changes, that is why it is so thin, our engines are not designed for those viscosities, particularly in hot climates.
I use 15/50 synthetic - its not thin, I have run it for 90K plus miles i have put on my car, 5k ago my HG went my bores were unmarked total miles 176k at that point.
I was occasionally hitting over 30PSI (lively) due to a boost controller leak which took out the HG. I do trackdays on slicks and often hit the rev limiter on the road, My car is around 350BHP.
My hot oil pressure only drops just below 3.5 bar on hot summer trackdays at idle.
I used to use mobil 1 motorsport now mostly use Silkolene Pro R.
I used to be into Modified Minis in a big way (1380 with rally cams big carbs etc.), they have a very hard life as the gearbox and engine share oil, Mobil 1 was a vast improvement over any other oil I used. (on the big ends, drop gear bearings etc.)
The only 'problem' with good synthetics (quality varies) is that they contain high quality detergents - on a sludged up (cheap) dyno oil run engine this may clean crap from behind the seals and create leaks.
Tony
Tony
#24
RL Community Team
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Originally Posted by MPD47
Forgot to mention, the letting it "wind down" with engine load is very important, helps ensure proper ring sealing via engine vacuum ![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
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