Oil question... am I crazy?
 

When I first got my GZ250 I promptly changed the oil to Mobil 1 MC synthetic. A week and a half ago I decided to change the oil again (early to get some winter weight oil in) and went with Shell Rotella-T synthetic. Now, after switching, I could swear my bike has more power. Part of me says its because of the oil, but the other part says that it must be the placebo effect. I mean, I was going down the road at 55 MPH in 4th gear and didn't even know it until I came to a stop light (*click click click* Did it just take 3 downshifts to get into 1st?)!

So... yea, I already know what you're gonna say, but I just had to put this out there.

Re: Oil question... am I crazy?
 

I think it may be more than psychological. When my oil was just a little low it had a huge impact on performance.

I've also noticed a big difference in power after the bike is running for about ten minutes. My bike sucks for about the first five minutes or so. Very sluggish in the high revs. I don't know squat about the MC internals, but my guess is, the oil gets more "slippery" when it's hot and the transmission exerts less drag on the engine. I'm sure that the other experts on here will set me straight.

Re: Oil question... am I crazy?
 

I also switched to Shell Rotella-T Synthetic, and I didnt really notice any "power" difference, but
it definetly helped my shifting, and it just seems to run smoother all around, it also seems to hold up better to the rigors of the GZ engine.

Re: Oil question... am I crazy?
 

Maybe my perception of "power" is more a perception of "smoothness" then?

Re: Oil question... am I crazy?
 

Maybe it's not all perception; might be just a coincidence.
Carbuarated engines tend to run better when the air is cool and damp.
I'm guessing that you have had a shift toward that, like we have had recently.

Re: Oil question... am I crazy?
 

Fresh oil will do that for you. The tranny will definitely feel smoother and the engine will thank you. Shell Rotella is used by many riders in a variety of bikes with great results. It meets or exceeds the requirements for M/C oils but Shell has just never bothered to get it certified for bikes.

Re: Oil question... am I crazy?
 

You're crazy.

Re: Oil question... am I crazy?
 

havent used any synthetic oil so i cant tell about the power coming from oil but i do use the supreme 93 gas sometime and this time i used the Shell V-power (prices are reasonable again). i felt the same. more power. actually its more smoothness and soundness of engine so fell like more power. will try the Shell Rotella-T synthetic this time.

Re: Oil question... am I crazy?
 

Yes. No point blaming the oil either.

Re: Oil question... am I crazy?
 

I'm just waiting for Alan to say he changed oil and it shifts better. :poked: