Castrol Syntec Blend

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#71

03-26-2009, 10:54 PM

KBFXDLI

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Quote:

Originally Posted by big cahuna

Gary7, you seem to have a different way of evaluating oils so, what do you use in your bike and why did you chose it?.,

Gary is looking at wear metals in a UOA not the additive pack. Wear metals in an analysis based on universal averages will tell if certain components are showing high than normal wear based on the mettalurgical make up of the components in that specific engine or trans etc.

Comparing additive package counts is not a reliable way to decide if an oil will work well in your application. The chemistry is just too complex and requires a very experienced tribologist or lubricant chemist.

#72

03-26-2009, 10:58 PM

KBFXDLI

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Quote:

Originally Posted by Gary7

You've got the basic chemistry down, but that isn't why conventional oxidizes faster than synthetic. The issue there is purity and saturation levels. Group I base oil is loaded with aromatics, sulfur, and other impurities, and is low in saturation. It takes a butt-load of antioxidation additives to keep oxidation in check. Group II (hydrocracked/hydroprocessed/isodewaxed) has higher saturates and less impurities and resists oxidation much better. Group III (hydrocracked or wax isomerates) has even higher saturates and less impurities and is even better at resisting oxidation. Group IV, Polyalpha Olefin (PAO), is 100% saturated with absolutely zero aromatics and other impurities. Therefore, it can resisit oxidation far longer and at much higher temps than any other type base oil.

I know but I was trying to keep it simple.

BTW, you forgot GRPV

#73

03-26-2009, 11:02 PM

Gary7

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Quote:

Originally Posted by big cahuna

Gary7, you seem to have a different way of evaluating oils so, what do you use in your bike and why did you chose it?.,

I use Penn Grade 1 20w50. I started using it in my Sportster when I noticed I was getting fairly significant fuel loading in the UOAs. Penn Grade 1 has an almost legendary reputation in the racing community for its ability to handle fuel loading and keep on protecting. It's also has the highest HTHS viscosity of any 20w50 made: 6.2 (which is even higher than Amsoil's MCV). This oil also has very good TBN retention and eleveated levels of ZDDP.

I'm on my first run of Penn Grade 1 in my FXDC. I'm going to change it out in about 700 miles and do a UOA on the next run.

#74

03-26-2009, 11:12 PM

big cahuna

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Is that Brad Penn racing oil? the old Kendall.,,wouldn't doing a uoa with less then 2500 miles give an inaccurate reading do to the motor still braking in and shedding metal?.,,

Last edited by big cahuna; 03-26-2009 at 11:18 PM.

#75

03-26-2009, 11:25 PM

Gary7

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Quote:

Originally Posted by big cahuna

Is that Brad Penn racing oil? the old Kendall.,,wouldn't doing a uoa with less then 2500 miles give an inaccurate reading do to the motor still braking in and shedding metal?.,,

Penn Grade 1 is an updated version of the old Kendall GT-1.

My bike will have 5000 miles on it when I do the first UOA, with 2000 miles on the oil.