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If you didn't blow yourself up sucking fuel with a shop vac, you'll be fine mixing different brand oils. Seriously, that is the stupidest thing I've ever heard of.

Hello about to take the banshee out for the first time ....the banshee was sitting before I bought it(4 month old gas ) ...so I took a shop vac and sucked out most of the old gas (yamalube mix) and made a new mix of Castro 927 ....Now my conworkers are telling me never to mix 2 diff oils and I could blow the engine ....I sucked out most of the yamalube gas ... I know the shop vac is ghetto but it’s a trick I’ve done on 4 strokes with gas sitting in it too long and I’m lazy to drain it the right way. Thanks any opinions will be appreciated I will drain the whole tank if I have to but I don’t want to

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This is a great conversation and like the rest of you I am learning a lot. Over my 30 years as a Banshee owner I would like to share the following points: - Your engine is a pump. It needs a combination of fuel and air to run. An imbalance of any of these 2 components can lead to performance and longevity issues. - Since you are on a 2 stroke, let’s define fuel as a combination of Oil and Gas. Air is the 3rd component. - Your carbs have a pilot and a main jet where a combination of gas and oil flow through them. - When I was a youngster, I used to think more oil made my motor run richer. This is incorrect. Gas keeps your motor cool, oil is there to lube your parts. (Think of a 4 stroke motor, you don’t put oil in your gas tank). The more oil in your gas/oil mixture the leaner your motor is running. - With the above said, after an engine rebuild, I will always run a little extra oil in the gas for extra lubrication. I will do this for the first 3 tanks of fuel and then back to my normal gas/oil mixture. What I have learned. I used to mix 20:1, then 32:1, then 40: 1 and now 50:1. I feel 50:1 is a comfortable balance of a gas to oil mixture for the modded Banshees I own. We want to keep our motors lubricated thus we want to use the right amount of oil, not too much, not too little. The oil you buy should have a recommended gas/oil listed See what they recommend (Call the manufacturer if needed) and use this as a starting point. Whatever you decide on for a mixture, always remember to verify your jetting.

I disagree, I’ve been messing with 2 strokes for bit. I’ve tested this on my Race saws a few times. More oil equals a leaner tune.