125-200cc Bottom End Oil

What are you guys using for oil?
I'm using Castrol 10/40 motorcycle oil and changing it every 2-4 racing hours.
How often do you change yours?
Oil is getting expensive and I'm wanting to get more hours out of it or buy it cheaper somehow.
Everytime I change it, it still looks like new.

ive been runnin rotella 15-40 for the last 4 years. never had any problems.

$50ish dollars for 5 gallons.

were talking about 2 stroke tranny oil right?

since 2 strokes get the oil for their bottom ends from the pre-mix in your gas.

I'm using rotella 15/40 also, and have been since 2008. I have used ATF-F in the past with great results also. No problems noted with either, but Im just waiting for me and my bikes to burst into flames for using a non moto specific oil. Lol

I'm running ATF type F also.

Rotella 15-40 and rotella synthetic t-6 5-40. No issues.

I use cheap diesel oil in everything. Wife and kids 4 strokes, street bike and my smokers transmissions. No problems...ever.
I was using Rotella 15-40, but recently switched to Mobil Delvac 15-40 cause my 300 was finding a lot of false neutrals with the Rotella.

I usually go 10hrs between oil changes, but I've gone as long as 17hrs with no ill effects.

Changing 2 stroke transmission oil every 2-4 hours is way too conservative. If using a good quality oil you can easily go 20-30 hours. I've changed it at 20 hours and it was still clean. I've gone as much as 35 hours with no ill effects.

Rotella, changed every 15-25 hours.... Still comes out looking pretty good.

+1 to above, my TM Racing 125 manual states to change the gearbox oil, twice a season...although I do change it by feel, more false neutrals or notchy/hard shifts then time to change.

Thanks to all! I have one more case of the Castrol to finish up and will try this out.

I just changed mine with Bel Ray gear saver oil.... But the next gear box oil change I'll tray that Delvac....