2 cycle engine oil question

[Cgolf]

So I am currently running Penzoil XLF synthetic blend in my boat. It is a 50 hp merc with oil injection. Well the Penzoil is sold out, common theme these days, and I picked up some Mystic 2 cycle outboard oil, non synthetic. Here is my question, it’s ok to mix the two right?  I know when I started using the Penzoil I mixed synthetic with non synthetic so this is probably a dumb question. 

[rdj735]

I run the BPS stuff (synthetic blend) because it goes on sale for $10/gallon occasionally. I bought my boat last year and dumped it into whatever was already in the tank. No ill effects so far.

[Way2slow]

I guess it's a matter of how long you want your engine to last and how much extra care you want to put into it.  All oils are not the same.

Fossil oils create carbon buildup, which causes more wear to rings and cylinders.  

Back in the early 2 stroke days when they ran plain old 30W non detergent oils at a 25:1 ratio, you were lucky to get a few hundred hours out of a motor.  Then they developed oil just for two strokes that ran a 50:1 ratio and they were getting 500-800 hours.  Still the fossil oil but better additives, and the finally got them to where you could get 1,000 hours with proper care and if they were decarboned every 50 hours or so. 

Then they came up with the synthetic blends, which reduced the carbon build up and finally the full synthetics.  Those helped in the development of the Direct Fuel Injected (DFI) motors because of the very little carbon deposit to worry about clogging up the injectors and much better wear protection. 

Now, if you have a DFI motor, and you want to run fossil oils in them, go for it.  Later on, you can start posting what a piece of crap that brand motor is because it's costing you a ton of money or you finally got rid of it for another brand.  

I think most manufactures will tell you to run nothing but 100% synthetic in their DFI and their synthetic blend in most everything else.  I don't think any of them would recommend a fossil oil since the blends came out.

 

However, it all boils down to my old saying.  "It's my motor and I can run what ever I dang well please".  

 

 

[Deleted account]

The whole why are folks still running 2 cycle outboards aside, the small low tech 50 isn't fuzzy, mix away. 

[Cgolf]

10 hours ago, Way2slow said:

I guess it's a matter of how long you want your engine to last and how much extra care you want to put into it.  All oils are not the same.

Fossil oils create carbon buildup, which causes more wear to rings and cylinders.  

Back in the early 2 stroke days when they ran plain old 30W non detergent oils at a 25:1 ratio, you were lucky to get a few hundred hours out of a motor.  Then they developed oil just for two strokes that ran a 50:1 ratio and they were getting 500-800 hours.  Still the fossil oil but better additives, and the finally got them to where you could get 1,000 hours with proper care and if they were decarboned every 50 hours or so. 

Then they came up with the synthetic blends, which reduced the carbon build up and finally the full synthetics.  Those helped in the development of the Direct Fuel Injected (DFI) motors because of the very little carbon deposit to worry about clogging up the injectors and much better wear protection. 

Now, if you have a DFI motor, and you want to run fossil oils in them, go for it.  Later on, you can start posting what a piece of crap that brand motor is because it's costing you a ton of money or you finally got rid of it for another brand.  

I think most manufactures will tell you to run nothing but 100% synthetic in their DFI and their synthetic blend in most everything else.  I don't think any of them would recommend a fossil oil since the blends came out.

 

However, it all boils down to my old saying.  "It's my motor and I can run what ever I dang well please".  

 

 

So below is what I picked up. Based on your comments I assume it is crap. Their quicksilver options at farm and fleet aren’t synthetic either. So essentially there are zero options at the farm that I should use. Since I really don’t need it for vacation, I can look around. Even with that I might have enough to get through next year sinc I rarely fire up the big motor on the water. In a week vaca I might use 15 gallons. 
 

https://www.farmandfleet.com/products/1344963-mystik-1-gal-jt-4-2-cycle-premium-outboard-motor-oil.html

 

8 hours ago, BassWhole! said:

The whole why are folks still running 2 cycle outboards aside, the small low tech 50 isn't fuzzy, mix away. 

Why, because I barely run the motor at all where I fish so I have a low hour 50 HP Merc that runs great so not worth the money to replace it. When I get the next boat it will have a 4 stroke or electric if they are mainstream then. 

[Way2slow]

I've put on ton of hours on motors run on fossil based oil.  Until the late 90's or so, that's basically all there was.  It wasn't until the DFI motors starting showing the synthetic blends started showing up, and they were expensive. 

With proper TLC and a little decarbing a couple times a year and you have no problems.  It's just those that don't do a decarb about every 50 hours that start eating the rings and cylinders up. 

I probably put a 1,000 hours ( we went through 18 - 24 gallons a day) with QuickSilver on a mid sixty's 65 hp merc I bought new when I was 16 and ran the total crap out of it water skiing every weekend for about three years, but I kept it properly maintained.  

Nothing wrong with QuickSilver oil.  Just give the motor the care it needs.  I will say, now I only run synthetic or synthetic blends when no full synthetic is available.  If I couldn't find a blend, I still would have no problem running Quicksilver in my 2006 90hp ELPTO (2 Stroke with oil injection) Merc. 

[Cgolf]

Well apparently Farm and fleet got the Penzoil synthetic blend in that I have been using and is cheaper than what I bought. I think it was cheaper the last time I bought it too. Will return the Mystic and pick up the other tomorrow.