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Old 08-28-2007, 07:12 AM   #11
pplassm
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Well, this is only a second hand report, not fourth hand.

I have a friend with a 2005 KTM450EXC. Manufacturer recommends using synthetic _mtorcycle specific_ oil. I use Suzuki synthetic in mine.

My buddy decided to save a few bucks by using Mobil 1 car oil. He immediately experienced excessive clutch drag when the bike was cold, and slight slippage in the top gears.

A switch to a motorcycle specific oil resolved the problems.

Just sayin'........
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Old 08-28-2007, 08:59 AM   #12
SmokeU
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The 95" and cams would be fun. My dad's torn between getting an '08 Road Glide or building up his '06.
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Old 08-28-2007, 09:46 AM   #13
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100's of thousands of miles using Synthetic with no ill effect. You do hear stories about the very light mixes of oil (5-20 and 5-30) causing clutch plate slippage on bikes with wet clutches, but I haven't experienced it myself.
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Old 08-28-2007, 11:01 AM   #14
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Originally Posted by SmokeU View Post
The 95" and cams would be fun. My dad's torn between getting an '08 Road Glide or building up his '06.
I have an 01, and I can get a six-speed and more HP and TQ that a new one for about 3500 bucks. No way could I sell mine and get a new one for that. Plus it would be a Baker six. No 5th gear whine!
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Old 08-28-2007, 11:13 AM   #15
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Originally Posted by seruzawa View Post
If you think it works then it does!

Every oil horror story I've heard has been 4rd hand at a minimum. Joe heard from Bill whose cousin had an uncle.....Sounds like a good suggestion for the Myth Busters.

Actually I did have the rear end seal go on my GSX1100G after I put synthetic in it. But it had 60K miles on it with mineral oil. It might have been ready to go already.
The only oil-based failure of anything I've had personal experience with was a DSM Transaxle that had Mobil 1 GL-5 synthetic put in it, when the mfgr calls for a GL-4. Wasn't the oil's fault that it was used inappropriately.

This is when I actually sat down and READ a bit about oils, instead of ASSUMING that the dipshyte behind the counter "knows all, tells all - Good Luck Charms!"

A higher number doesn't actually mean it supercedes a lower number..............
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Old 08-28-2007, 11:24 AM   #16
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Originally Posted by bbtowns View Post
100's of thousands of miles using Synthetic with no ill effect. You do hear stories about the very light mixes of oil (5-20 and 5-30) causing clutch plate slippage on bikes with wet clutches, but I haven't experienced it myself.
It's not the light-weight of oil, it's the EP additives that cause wet-clutch slippage.

EP additives are designed to cling to bearing surfaces and be slippery under Extreme Pressure when the oil itself might be "squeezed-out" of the lubrication cavity.

As a typical wet-clutch works by springs squeezing a friction-material between metal plates and "locking up" to transfer the motive-force of the engine through the drivetrain, any additives that might reduce that friction (ahem - "EP" additives) can cause the clutch to slip.

Go figure.

Mobil 1 15w-50 is free of EP additives, just as an example.

Look for the "Energy Conserving" wording, or "EC-II" logo in the lil' circle on the container. If it has it, don't put it in a wet-clutch machine, or one will likely have problems.
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Old 10-10-2007, 03:34 PM   #17
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due to the unfortunate taxing system here in eastern europa, mobil 1 costs $30 per quart... i'm not going to support that bit of legislation, so i use a standard bauhaus API-rated SL semi-synth in mein geschwindigkeitsdämon, and change frequently.

it may not be fully synthetic, but it's additive package is three generations newer than what the manufacturer "requires," and i have a belly button.
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Old 10-10-2007, 04:27 PM   #18
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I use Mazola at 32.1 in my Betty Crocker 250 MX. Not only does it cut down on cholesterol, it also leaves a nice tasty brown glaze on the piston, that the family just loves when it's time for dinner. Mmm Mmm.
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Old 10-10-2007, 05:52 PM   #19
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I read an old HD factory manual that recommended adding a little kerosene to your 60 weight for winter use.

My buds about sh*t when I started using 20w50 in my bagger instead of 60w racing oil everyone else used, when I sold it it had over 60k on on a virgin motor. It was getting a little noisey but I think it was the rockers arms sliding around as they are prone to doing on Shovelheads, I just couldn't be bothered f*cking around shimming them
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Old 10-11-2007, 06:47 AM   #20
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Originally Posted by sarnali2 View Post
I read an old HD factory manual that recommended adding a little kerosene to your 60 weight for winter use.
This from the same clowns who spent a decade convincing everyone that synthetic oil would destroy their HD engine within 1k miles. It reminds me of the IBM engineers who came to the company I used to work for. They had a physicist explain in great detail why 100mb Ethernet would never work, and would actually cause the aircraft landing at the nearby airport to crash and burn due to the RFI.
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