We just started carrying repsol oil today, and it looks really tempting. Anyone here use repsol's oil? I know if I decide to switch to synthetic I'll use it, I've just always heard mixed reviews on using synthetic on sport bikes.

 

I broke my CBRs in on Castrol Actevo. When they were "broken in" I switched to Repsol 4T 10w50. I like it and it does what it's supposed to do. It is a little expensive and I get for almost costbut..............(here it comes).......... you get what you pay for.
Iread somewhere thatMobilOne for 2 stroke and 4 stroke bikes is now being sold in the U.S. It mightcost a littleless than the Repsol.I use Mobile One in my RSX and have no complaints about it so I would guess their motorcycle oil is just as good as there car oil.

 

Amsoil is still the king. Period. No more discussion. Yes its $8 a quart. I took a F3 motor apart that had 61k miles on it and had only ever been on Amsoil. The cylinder liners looked BRAND new. Wasnt even worth honing them out.

As far as synthetics go, they kind of have a bad rep in motorcycles, and its HUGELY undeserved. I cant remember which designation it is, I think its an SG (or is it SJ? Cant remember) rating on the oil that you want to skip, but you mostly only find SG in car oils, which is why you wanted a oil formulared for bikes. The bad rating (whatever it is) means that your fiberous clutch plates may be permeated by the oil, causing excess clutch wear or even causing clutch plates to literally fall apart.

While I can remember the desginator (I'll research it and post back) just know that if you stick to a synthetic designed for bikes, you'll be ok.

If you want the best protection, its absolutely Amsoil.

 

My understanding is that SJ is better than SG. However, according to the users manual on page 102, either are okay as long as the do NOT state "energy conserving" on the circular API label.

Tha manual also suggests you stick with 10W-40. I am sure this rule can be bent as long as you are within the recomended temperatures for the oil.