I am going to add oil soon but, I don't know what type of oil [reg or synth] the previous owner used.
Should I be able to tell by looking at it [feeling, smelling , etc]? Does it matter: Can I just add the new oil, regardless? Or should I just drain it and start fresh?
Oil adds on 2T
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Oil adds on 2T
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I doubt you can tell what's in it by smell, etc., although some oils have a distinct color dye. The problem is that more than one oil company may use the same color dye.
Mixing oils won't hurt anything, but personally I would follow the advice to run it down to the sight glass then fill up with whatever you want to use.
I use Motul 710 synthetic (which is green). I'm sure lots of discussion could be had about the protection level of normal 2T oil vs. synthetic, but neither will harm your engine. I use synthetic because it burns cleaner and smokes less, not necessarily because I think it protects any better (it may, who knows). There are lots of brands out there, so it really comes down to personal preference and availability.
You could drain the oil tank it you're worried about what's in it. If you do, I'd run a gas tank of 2% pre-mix (50:1) through it afterward just to make sure the oil injection pump has a chance to get primed again. Do the same thing if you ever pull the oil pump/carb out or if you remove the lines to the oil pump.
Mixing oils won't hurt anything, but personally I would follow the advice to run it down to the sight glass then fill up with whatever you want to use.
I use Motul 710 synthetic (which is green). I'm sure lots of discussion could be had about the protection level of normal 2T oil vs. synthetic, but neither will harm your engine. I use synthetic because it burns cleaner and smokes less, not necessarily because I think it protects any better (it may, who knows). There are lots of brands out there, so it really comes down to personal preference and availability.
You could drain the oil tank it you're worried about what's in it. If you do, I'd run a gas tank of 2% pre-mix (50:1) through it afterward just to make sure the oil injection pump has a chance to get primed again. Do the same thing if you ever pull the oil pump/carb out or if you remove the lines to the oil pump.
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