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Best / correct engine oil!!

734 Views 14 Replies 4 Participants Last post by  Blackpowder
Hello guys! I just finished rebuilding my motor and turning it to 280cc, everything is new. So I am looking for a good oil that I can use in my rebel so it will last for an other 30 years without a rebuild! ;) searching the forum I found many guys just using Walmart oils and stuff like that and since I am changing my oil every 2500km everything will be fine, but I don't feel so good with that advice! Up until now I was using Castrol power 1 10w40 and after every oil change it was like water, not thick at all (even though it has pretty good reviews). Any recommendations? Brands, viscosity and if I should use synthetic or semisynthetic oil...
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IMO, with frequent oil changes, synthetic oils are a waste of money. Forum member Buickguy put over 100,000 miles on his 1987 CMX250. He used Castrol GTX and I believe he changed it every 1,500 miles (approximately 2,500 km). Any good quality oil, that doesn't have friction modifiers will provide excellent protection. All oils that meet JASO standards would work and don't contain friction modifiers. One such oil is Shell Rotella T4 15W-40.

I don't think you can judge how good an oil is by how thick it appears.
I am looking for a bike specific oil. I have read some pretty good review about the GTX (even though it is not bike specific) but in my country the Castrol (moto only) that I used has the same price as the GTX so there is no point on going in that direction. And sadly for the rotella is not available here
How is the 280cc kit running ?
It is running great! It is not a kit, I rebuilt the head and fitted bigger pistons! I do not remember the specific numbers but I can look it up if you are interested. The only thing that I had to do is change the carb (or you can rejet the original)
Good to hear :)
What did you change the carb to?
Oko pwk 30mm. It's a Keihin clone
Sadly the dual rebel carbs are not available in Greece! If there is an other carb that I could try I am open on suggestions or more performance mods! The setup that I am using right now is big bore kit, 30mm oko flat slide carb (don't remember the jets), pod filter, free flow exhaust with buffles, and 33 rear sprocket, thinking going to 30 for better top speed.
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