Motor Oil 104

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I had a Honda 750 Four in the '70's, put over 50,000 miles on it myself. Later I got a BMW R65. About 4 years ago I sold my last bike a Honda ST 1100. I ran 10w30 in all but the last. I used 5w30 I think. I put the original Mobil 1 in the BMW, it leaked terribly. After I went back to conventional oil it sealed back up perfect. I never put synthetic in a bike again.

I think you are fine just as you are with your bike. A 10W-40 may be better for start-up wear reduction.

aehaas
 
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Many of you will think this cruel but if we are to keep a cutting edge discussion ongoing at BITOG ,please do yourself and the board a favor and post less, read more.

I agree
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I can't integrate the long posts in one package ..and I'm left feeling like I've just gotten the full version of Mein Kampf in unabridged lecture (lecture being the operative word). I'm sorry too ...but I feel like I'm expected to
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Or is it: Öl entsprechend mir ??
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[ January 20, 2005, 06:32 PM: Message edited by: Gary Allan ]
 
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By Molakule

The definition should NOT be left to lawyers or the courts alone but have input from the chemistry community.
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I'm very appreciative of your coming in on this Mola. I do enjoy reading discussions like this but I believe the author is way off course on this one. I also see that a proper definition of "Synthetic" should be appropriately established. This has about gotten out of control. Lawyers are too often liars (sorry about that, I spent a lot of time in courts in a former line of work) and judges don't know enough about these matters to establish such a definition. They very often are not the sharpest kids in the block. I know, I've been there in a substantial number of trials.

There is a small handful of you guys that know a lot about lubrication matters. You have taught the rest of us a lot.

I don't know whether Terry would like for me to post even less than I do but I see his point. There is a lot of excess verbiage that even we 'learners' easily pick up on.
 
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Originally posted by AEHaas:
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PS How is it that the mist of a 40:1 dilution of 30 wt motor oil to gasoline can lubricate the area with the most wear in a 2-stroke spark ignition engine, the piston and rings, let alone the bearings? Gasoline has approximately half the viscosity of water.


Answer, it does not lubricate very well. I have siezed many a two stroke motorcycle engine in my day. A more quantitative answer is this. Two stroke light aircraft engines typically have a TBO (recommended time between overhauls) of 500 hours vs 2400 hours for many non-turbocharged four strokes that typically specify straight SAE 50.
 
Skunky,

The best way to find out what you may need is to test a virgin jar of oil then retest the oil from the engine at 500 or 1,000 mile intervals. If the additive is getting depleted a higher starting level may be desirable. In the article from SAE 0.03 is not enough but 0.05 probably is. The SM oils I have looked at have 0.08 so far.

aehaas
 
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