Mobil 1 15w/50 Honda Nighthawk 3891 miles

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Dec 9, 2002
Eastern burbs, MN
This is the report I got back from Blackstone Labs. This is on my 1997 Honda Nighthawk 750 using Mobil 1 15w/50. The oil had 3891 miles when tested and bike had 48,153 miles on it. I added 6oz of Delvac 1300 15w/40 (I didn’t have any Mobil 1 handy). The first line is the actual reading and the second is the universal average. I’ve been using a UNI oil-foam air filter and Emgo oil filters. I use this bike on long distance endurance rallies (Saddlesore 1000 and the type) with sustained rpms at 5500-6000 for hours on end. No unusual comments by Blackstone and they added that the engine is wearing well, insolubles and silicon were low showing excellent oil and air filtration. I'm happy and I'll probably run this oil to at least 5,000 miles before the next change (Blackstone didn't give a recommendation).

Aluminum 15 19
Chromium 1 1
Iron 11 12
Copper 1 5
Lead 2 2
Tin 0 1
Moly 71 93
Nickel 0 0
Manganese 1 1
Silver 0 0
Titanium 0 0
Potassium 0 0
Boron 146 147
Silicon 9 10
Sodium 6 6
Calcium 2725 2241
Magnesium 71 191
Phosphorus 894 903
Zinc 1075 1048
Barium 0 1
Sus Viscosity 82.6
Flashpoint 395
Fuel % Insolubles %0.2
TBN 8.7
It's interesting how your Nighthawk and my VFR wear differently. I have 43,000mi on my '94 VFR, and after 3,000mi my wear-metals were:

Fe 6
Al 5
Cu 10
Cr 0
Pb 2

Si 5

This is with Delvac 1. It sheared quite a bit though. Your oil stayed in grade well. I have the UNI filter also and they seem to filter as good as the stock paper.
I really don't know what to say on that. I'm just going to take a wild guess and say that may be due to more rotational parts in your VFR's gear driven cam setup than my Nighthawk's simple cam chain. It could also be due to riding habits. I rarely take the NH past 7000 rpms but it usually stays in the 5000-6500 rpm area quite a bit (flat torque curve makes it pointless to go past 7K). I'm doing at least two more long trips this year and if this oil change has over 4,000 miles on it I'll do one more analysis and see what it says. So far I'm really pleased with the results.
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