Gasoline grade for a 620

Zeb16223

Member
I am guessing that mid grade gasoline is good in this engine. I have the choice if ethanol or non ethanol..... I choose non ethanol.
 
As far as here in the EAST,, 91 OCTANE NON - ETHANOL is all we have, if you can afford it great about $.065 cents more than 87 with E. Your tractor will run just fine with 87.
 

Thanks for the reply. I was ready to pay for the premium gas non ethanol but was hoping the mid grade non ethanol would be good. I will not even put the ethanol in my mowers let alone cars or tractors. I have had too may carb issues with the ethanol.
 
Your 620 will love e10 gasohol so will your cars and trucks don,t believe all B.S. about ethanol i run it in golf kart ,chain saw old tractors and pickups also lawn mower. don,t tell me i will have trouble as i have been running it for 20 years
 
Mid grade will be fine but I usually run the high test non ethanol. Back when it was new regular gas at the pump was 93 octane. High test was 100 to 103. My how times have changed.
 
Same here - my Deere M, Farmall 350, 1961 Scout, numerous vintage garden tractors, lawn mower, and of course my modern vehicles all have been getting a steady diet of E10 for years and all run great. The only engines I still run straight gas in (assuming no E10 label on the pump means pure gas which maybe isn't a safe assumption) are the two-stroke chainsaw and trimmer. For everything else, though, it's the far cheaper E10 that goes in the tank.
 
I've run E30 in my 620 numerous times with no problems. It is a little less responsive till it gets warmed up and after that you can't tell it's in there. Had the tractor for 24 years and it's only ever ran the E10 or 30 in it.
 
I agree, I run 87 octane 10% ethanal in everything I own and and have no problems. 30 years ago when they removed lead from gas, every fuel and engine probem was from that junk unleaded fuel. Just don't leave fuel sitting around, but then I'm still burning that gallon of weed eater mix I made up last summer.
 
If you feel more comfortable with non ethanol, use it. Like others, I have used 10 percent ethanol in everything on the farm that uses gasoline for all of 30 years with zero problems caused by the 'evil' stuff. When I take apart a carb off of an engine from my farm there is no gum or goo. Come to think of it I haven't had a carb from this farm apart for general cleaning for many years.
 
never gave it a thought in old tractors.
I think they will run well on anything that burns :)
any grade...If it comes out of the pump and goes into those touchy new cars, my tractor will think it is getting fine wine.

besides, if you live in the North, we have been dumping alcohol
in the tank (drygas) for far longer than that new-fangled gas has been around....
(glad there is no need anymore to do that!)
 
(quoted from post at 16:08:41 07/26/15) Your 620 will love e10 gasohol so will your cars and trucks don,t believe all B.S. about ethanol i run it in golf kart ,chain saw old tractors and pickups also lawn mower. don,t tell me i will have trouble as i have been running it for 20 years

If you have ran the E10 and had no issues, bully for you. As for here in North Carolina, HIGH humidity, the E gas will draw moisture and cause corrosion in carbs mostly settles in the float bowl but still a pain. I have a JD mower that will not run on E gas and the wifes Kia just plain runs better. Maybe it is just different regions and different gasoline mixtures.
 
I have been using E10 since it became available in the 70's with ZERO problems. In fact, once you get the fuel system cleaned out it will stay that way. I have used it in working tractors, low use tractors, lawn mowers, chain saws, four-wheelers and about anything on this farm that takes gasoline. NO problems. Use it with confidence and don't believe the naysayers. Mike
 
(quoted from post at 07:03:19 07/27/15)
(quoted from post at 16:08:41 07/26/15) Your 620 will love e10 gasohol so will your cars and trucks don,t believe all B.S. about ethanol i run it in golf kart ,chain saw old tractors and pickups also lawn mower. don,t tell me i will have trouble as i have been running it for 20 years

If you have ran the E10 and had no issues, bully for you. As for here in North Carolina, HIGH humidity, the E gas will draw moisture and cause corrosion in carbs mostly settles in the float bowl but still a pain. I have a JD mower that will not run on E gas and the wifes Kia just plain runs better. Maybe it is just different regions and different gasoline mixtures.

Zeb, I'm in Northwest Iowa where we do have higher humidity but it doesn't average as high as it does in your neck of the woods day in and day out so I haven't had any experience with ethanol in the coastal areas. The ethanol problems we have encountered here is mainly dried out diaphragms and rubber fuel lines in older vehicles that aren't updated to ethanol resistant components. I had a 76 Plymouth that had an accelerator pump diaphragm that wrinkled if I used ethanol. My 73 Plymouth didn't have that problem nor does my 79 Dodge pickup. I could not get an ethanol resistant diaphragm for the 76 Plymouth. Go figure! Older Ford Rangers had an accelerator pump diaphragm that wrinkled too. I suspect, though I hate to admit it, some fuel shutoff diaphragms in the two banger Deeres deteriorated and turned to tar when ethanol was used. Ethanol resistant diaphragms are available though I saw a supposedly ethanol resistant diaphragm from mother Deere turn to tar in one year. I replaced it with another one from Roberts Carb and it is holding. The diaphragm in my 630 has been holding with ethanol against it for at least ten years. I have replaced it twice in the 55 years the tractor has been on this farm. Some of the problems blamed on the alcohol in ethanol are actually caused by the crappy gasoline the alcohol is mixed with. They take crappy low octane gasoline and raise the octane with the alcohol. All of my gas tractors have a black sooty exhaust pipe when years ago the inside of the exhaust was white.
 

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