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What is a good alternative lab to Blackstone for doing UOA? I see many folks on here think Blackstone is an unreliable testing source.

I agree something doesn't make sense. Air cooled Harleys are not known to shear oil. VR1 has been golden in the twin cam engines. The only fueling issue I can imagine on a stock M8 is a cracked or warped (plastic) intake manifold but I would think there would be other symptoms if that were the...

I changed to Valvoline 20-50 4t syn and top end engine noise is about the same. Hopefully my next UOA is better.

What would cause fuel dilution on a good running low milage epa lean stock motorcycle?

It's a bit of a mystery why conv VR1 is shearing in my M8 Harley. I do 99% of my riding when temperatures are below 85 degrees and I don't sit and idle in traffic. 20w-50 VR1 has been the gold standard of conventional oil for use in air cooled Harleys. The M8 engine is different since it uses...

It's between Mobile 1 15w-50 and Valvoline 4t 20w-50 synthetic. I used M1 V-twin for years in my previous twin cam stuff but it has a nasty habit of thickening to 60w in as little as 3k miles. I thought about the synthetic VR1 but it's not available locally. Conv VR1 works great in TC96/103...

The oil reacting with the copper in the oil cooler is the reason for the high copper. All the M8 UOA I've seen show high copper.

Extracted a sample of oil to see if I wanted to stay with VR1. It sheared to 40w again in only 1600 miles. They must have spilled some of my sample because I sent them a full bottle plenty to test flashpoint. Wear numbers are fine but I think I will switch to synthetic. I'm disappointed for...

Conventional. The low viscosity surprised me as I've never seen that on a uoa of VR1. I'm happy with the wear metals. Copper I'm thinking is from the oil cooler

I wanted to try Rotella based on a great many Victory UOA's that had stellar reports with it. Also, another forum member (Spur) posted a great looking UOA from his Indian using Delo 400le. I did kind of screw up the sample this time as I was in a hurry and didn't get the oil all that hot when I...

Previous UOA was Indian brand 20w-40.

Not sure about the CK-4 T5/T6 but the ck-4 15w-40 Rotella is nearly the same oil as the old CJ-4 formula. The ck-4/sn DELO and Delvac oils are significantly different with much lower zinc/phosphorus levels.

Check this out for info on four CK-4 oils: https://pqiablog.com/2017/04/24/results-in-on-four-api-ck-4-diesel-engine-oils/ Valvoline blue and Rotella T4 still have healthy zinc/phos levels. Delo and Delvac 1300 do not.

Shift quality definitely improved. Valve train noise seemed better but after 300+ miles on the Rotella I think it was mostly in my head. I'm thinking of trying a 20w-50 next time to see if it improves the noise. I wasn't surprised about the Indian oil being weak. I've been looking at some of the...

Thanks Spur! Actually I've been reading your oil conversations on the Indian forum and your UOA of the delo 400le is what convinced me to try a HDEO in the TS111. I'm a bit confused about the new CK-4 versions of rotella, delo, etc. If the new zinc/phos levels are lower than the CJ-4 stuff I may...

The iron was a bit high but it's only the second oil change (first was by dealer at 500 miles) so the engine was just starting to break in. Not sure why the silicon was high as I'm using an oem paper air filter. I agree the additive package in the Indian/Victory oil (20w-40 Semi-Synthetic) is...

Was the Rotella t5 15w-40 you used the old CJ-4 formula or the new CK-4?