Wed Aug 14, 2013 12:33 pm

I just purchased a 1946 cub. Do I have to put a lead additive in the fuel or is regular unleaded okay?

Re: Gasoline

Wed Aug 14, 2013 12:48 pm

No. Regular pump gas works fine.


Re: Gasoline

Wed Aug 14, 2013 2:15 pm

Regular gas will work just fine. But having said that, I am not a fan of 10% ethanol gas. It goes stale quicker than non-ethanol and will dissolve rubber hoses, o rings, seals, washers, etc. So, I use only non-ethanol gas in all of my off-road engines. That includes all 2 cycle such as chain saws, weed eaters, etc. And of course Farmall Cubs.

Just my 2 cents.

Re: Gasoline

Wed Aug 14, 2013 3:04 pm

I use ethanol regular 87 grade....I do have a lead additive, but I use it ....not so much...I use my tractors regularly (every day) and really can't monkey with or afford adding lead additives on a regular basis and chasing down or affording ethanol free gas...( Only comes in premium grade around here at way over 4 per gallon)........Dave

Re: Gasoline

Wed Aug 14, 2013 3:35 pm

Didn't notice you post date....Welcome to the Forum....Great place for Cubsters....Dave

Re: Gasoline

Wed Aug 14, 2013 3:48 pm

Welcome to the forum, dh... I have not much to add to the talk about gasoline for your cub, but was wondering what your serial number is on your cub? You say that you have a 1946 Cub, but the Cub was not introduced to the world until 1947... Post your serial number and we can help you with the actual year of the unit!

Enjoy the forum...some really knowledgable folks here!


Re: Gasoline

Thu Aug 15, 2013 8:26 am

hi, i've always run non ethanol in my small engines and have put it in the cub since day one,also every once in a while i put chevron "techron" in the gas for everything. i've found that weedeaters,demo saws ,tamper , etc. all start right up come spring. works for me. the gas is $4.80 a gallon here but the benefits offset the cost.................John

Re: Gasoline

Thu Aug 15, 2013 8:41 am

Welcome to the Forum.

At the bottom of the page click on TM tractor parts (one of our great sponsors) look on left for how to ID your cub.

Re: Gasoline

Thu Aug 15, 2013 10:25 am

G'day to you and congrats :applause: on acquiring your 1st new to you Cub. :big smile:

Suggest you follow the links below and read the information there in. We have a lot of resources for our members from the Owner's Manual right on up to How To Fix That articles..

Image to :big smile: Forum Family. And you have come to the right place for all things Cub related. If you click on the Site Rules, Regulations, & Important Information, it will point you to :arrow: the Welcome Wagon wherein you will find links to many useful sites and topics. One of the most important resources are Owner's Manuals, Parts Catalogs and Service Manuals. The Cub Manual Server is the home of the jpg versions and the PDF Manuals -- well the pdf's of course :wink: Enjoy!.

Re: Gasoline

Sat Aug 24, 2013 5:05 pm

Thanks, by the way it is a 1947 cub. Not sure why I put 1946!

Re: Gasoline

Sat Aug 24, 2013 5:17 pm

We run gas straight from the pump, mostly 10% ethanol in everything that takes gasoline and have no ill effects.


Re: Gasoline

Sat Aug 24, 2013 9:12 pm

anyone know if there's anything wrong with using higher octane gas? I know they don't need it, but I bought premium to get ethanol free, then realized these engines were built for low octane fuel.. I know that using regular 87 octane in some engines can cause detonation problems, but is the opposite true?

Re: Gasoline

Sat Aug 24, 2013 9:25 pm

Hello and welcome! I am a big fan of ethanol free gasoline. Like the others have said, several drawbacks to the 10% ethanol, my biggest problem with it, it is very hard on rubber and some soft plastics (like tubing on a chain saw) not to mention the other problems. That said, a cub will run fine with 10% ethanol. Why create headaches when they can be avoided. I would still use fuel stabilizer in ethanol free gas if stuff sits for any length of time.

Re: Gasoline

Mon Aug 26, 2013 2:31 am

You knlow fellows I have been using SHELL-VMAX for 2 years now.
All my riders, saws, tillers etc and they really do run and start better. That is all there is to it.