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Old 01-24-2019, 07:06 PM   #13 (permalink)
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Join Date: May 2012
Location: Georgia
Posts: 724

Cibbie - '88 Honda CBR 250R
90 day: 49.62 mpg (US)

Rarity - '06 Honda Accord EX V6
Team Honda
90 day: 33.32 mpg (US)

Baby viff - '86 Honda VFR 400R
90 day: 42.15 mpg (US)

Latios - '08 Suzuki SV650SF
90 day: 71.37 mpg (US)
Thanks: 573
Thanked 257 Times in 172 Posts
Originally Posted by jkv357 View Post
You don't want that oil! That's standard automotive oil.

Clutch slippage isn't the issue, it's the lack of adequate ZDDP (Zinc and Phosphorus) that's the problem. Those levels (600ppm) are fine for a current auto engine with roller rockers, but not for a solid, non-roller, valvetrain like cycles use. You want around 1200ppm for a cycle engine. ZDDP is sacrificial and protects the cam and rocker faces (high pressure areas) from galling at times when flow is minimal - you want it.

Use a diesel oil like Rotella T5 or T6 - but NOT the new "Multi Vehicle" 5W-30 Rotella T6 - it has low ZDDP levels like regular auto oils.
If it works, then i'm paving the way towards proving that car oils work just fine in a bike. If it blows up(catastrophically), then i'm out $1000, which I can afford. Read the blog jkv, the guy covers the misconceptions around ZDDP and how it doesn't determine wear protection on its own. He gets pretty ranty, but its a good read and offers oil data that I have never seen anywhere else.

He also covers some testimonials as far as high ZDDP oils and occurences of engine failures, vs using high performing oils.
-Kaze o tatakaimasen-

Best trip in V6: 52.0
Best tank in V6: 46.0
Best tank in CBR: 61.3
Best tank in VFR: 62.5
Best tank in SV: 83.9

Originally Posted by MetroMPG View Post
You can lead a fashion-conscious horse to unusual-looking water...

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