Fuel Mixture

[MAPEX]

Hey guys,

I'm starting to get the SRX around for pre-season prep and what not, but at the end of last season I ran into an oil pump issue. The oil pump was lacking enough pump stength to feed to engine, therefore I've just decided to run pre-mix. So the question is, what ratios have you guys been using that works best for a completely stock 81 SRX. Any input would be greatly appreciated. thanks

Mike

[Bob Vehring]

I use 40-1 with a good oil. I use Amsoil Dominator. Many good oils but also some cheap stuff, I wouldn't use the stuff from the corner gas station. I've also learned the hard way, with any syn oil to fog before storage or periods on non use

[Vmax540]

F.Y.I.

Please understand this is supposed to be an independent individual doing this testing ?

https://docs.google.com/spreadsheet/ccc ... n_US#gid=0

http://www.hardcoresledder.com/forums/3 ... -know.html

[Vmax540]

I'm with Bob and believe with most of todays high quality oils that 40:1 is plenty safe. I.M.O. Decent gas is a bigger issue and yes, use conventional oils during storage.

http://pure-gas.org/

[Bob Vehring]

Most likely, there will be a "new" oil coming to the Kart world soon from a major manufactorer. I can't use any names because its not releasd yet. Lets just say their on that list
I don't know the person who compiled the list that Chuck posted, I'm sure he put some time in gathering the info but no expination of his soruces. Most of his data is just general info, base composistion, pour point, avalibility and so on. The important one would be RPM breakdown. Without a expination by the author, we don't have much to go on. Unles it was done in a lab on a spec engine, I would think there would be quite a variance in things that would effect his results.

In the testing of the kart oil there was over 6 months of lab testing by both the oil manufactorer and the engine manufacoter, both are some of the biggest names in the world. We (my kids) were called in for the on track testing portion. The oldest of my two is also a dyno operator for the engine manufactorer as a day job. We built 4 identical modified engines for the test, then they rented Road Americas track for two days of testing. 4 Drivers spent two, eight hr days runing these engine flatout. Each 1/2 hr the karts came in to download data systems and take oil samples ect.
My involvement was to sit in a lawn chair and talk with the engineers from the oil company I came away quite impressed with the amount of very serious work that went into this project by the oil company.
Certianly I can't speak for all oil companies, but I can say Briggs went through this same process 5 years agp trying to deveop a oil line. and while the oil did come out or a short period of time. (It was a big name company from the automotive world,) it was a complete failure for several reasons
Quite an expieriance seeing what some of these name oil companys put into developing their product