GP1200R

I was just very surprised at how thin the oil was after a relatively short period of time

fuel dilution....welcome to boosted rotaries

see the "OIL ANALYSIS" thread

rotary-tt

I'm not so sure about this. I would think boundary flow of the liquid would be improved and you would have less fluid shear but I'm now getting way out of my area of expertise

Kento

Thicker viscosity oils will nearly always result in higher oil pressures, since the oil pump is working against a denser fluid. Higher oil pressure is not necessarily better. BTW, oil pressure is related to rpm, not throttle position.
It should also be noted that some feel the reason for the OEM oil pressure sending units' meager life span is due to its position in relation to the oil pressure relief valve, and the resulting high pressures the sending unit is subjected to. You'll note that with 20W-50 oil, the engine must be at full operating temp in order to avoid maxing out the oil pressure gauge at anything over 3000 rpm.

Not saying that your oil wasn't thinned out somehow, but when oil is warm/hot (as it most likely was when you drained it), it is pretty difficult to tell a 10W SAE viscosity grade difference by sight alone.

Kento

I'd say that's a bit of a stretch, at least in this case. You're going to have fluid shear any way you look at it, because the journal spins and the bearing (usually) remains stationary. If this were a Formula One V-10 spinning to 18,000 rpm, then perhaps it would yield an improvement, but again, it would be relatively miniscule.

rotary-tt

Let me try this. Do you think 2 'rough' surfaces sliding over each other with a thin fluid layer between would cause less friction than 2 'smooth' surfaces? Every little bit counts. How do you account for the hp gains which Hot Rod mag (and many others) are getting with RP (including Racing Beat)? Must be something to their claims...

Street King

I haven't heard of one person personally that hasn't felt/saw an improvement while using RP. It's just a bitch to get around here with out odering it, is why I haven't used it yet.

rotary-tt

http://www.racingbeat.com/resultset....rtNumber=11959

Racing Beat sees up to 2% increase and I've believe Hot Rod got up to 5% increase in hp.

Kento

Do you think that any gains from this supposed friction reduction from microscopically smoothing bearing surfaces alone are responsible for the hp gains that Hot Rod and RB achieved? There are a great many other facets of oil performance that would play a far greater role in increased hp production. Again, remember that I never said that RP products are bogus. I was only stating that you should be careful how far you read into supposed "information" without any detail data to back it up, especially when it is used in the context of a product advertisement.

EviLPeNeviL

iTrader: (2)

Wait a sec....... The only yellow bastard here is ME. Or were you talking about my yellow banana? Or something else?






Like I said before regarding RP oil, my miles per tank seems to get better and better with each fill up. And I only use gas from 76 because that's where I notice the biggest improvement.


-Dan

bureau_c

For what its worth, there's a guy who sells RP oil of pretty much every viscosity on Ebay. Even with shipping, its the cheapest I've seen it.

jds