Oil for fast go cart.

[James408]

My son has a used Murray go-cart with a 6 hp tecumseh. I just put a new carb on it and Carb opens all the way and quickly. The go-cart sees alot of wide open throttle. I have used both 30 wt and 15w40 hdeo. I have used Valvoline 30 wt., royal purple 15w40, and Delo 15w40. The only thing I worry about with a multi grade is that a 13 year old does not always let the motor warm up before hard use.

I am thinking of switching back to Chevron Delo 30wt hdeo that I use in my lawn mowers.

Should I switch to a 30 or 40 mono grade or stick with one of the 15w40's mentioned above?

One last question. Will the Chevron Delo 30 wt hdeo out perform a 30hd passenger car oil in an air cooled engine?

Any thoughts will be appreciated.

 

[80caprice]

mmm tecumseh....was the connecting rod upgraded? i mean if its turning more rpm's then what it was designed for....? pretty much a air cooled engine is ready to go...even newer mowers are designed with two speeds.....off and 3600rpm.... personally i'd probablly use mobil one 10w-30, or either a 15w40 conv. but mono grade 30 wieght is still a good choice.

 

[wileyE]

is it pressure fed or splash?

 

[Bill Kapaun]

quote:

---

Originally posted by James408:
.. The only thing I worry about with a multi grade is that a 13 year old does not always let the motor warm up before hard use.

One last question. Will the Chevron Delo 30 wt hdeo out perform a 30hd passenger car oil in an air cooled engine?

Any thoughts will be appreciated.

---

A multi grade is supposed to flow better in a cold engine. Ergo, it should be better if the engine is not warmed up.
It might not offer quite as good protection as a straight weight once it's warmed up however.

Usually "diesel" type oils will have more anti wear additives (the ones that poison catalytic convertors) than a "gasoline" oil.

I liked 15w40 Delo in my lawn mower, although I switched to Chev. Sup 10W-30 for a little easier cold starting. The 15w40 required 4-5 pulls instead of the normal 1-2 when the temperature was in the 40's.

 

[James408]

Wiley, it is a splash system I believe.

I am not sure what rpm it is running. I've notice that the engine has a miss at full throttle. Is this an internal governor or too much gas going to it?

 

[wileyE]

miss? could be valve float(rpms too high)? fuel pump not keeping up? plug getting hot? timing governed?

Just wag's


Splash fed? not sure all the theory about flow and pumpability cold and hot temps etc really apply too much? 30w 40w whatever is laying around the garage would be fine I'd think.

 

[Bror Jace]

James408, you already got some good replies ... especially the one from Bill Kapaun.

Yes, a multi-viscosity oil will be better for an engine run hard before a proper warm-up. 10W-30 Chevron Supreme is a good oil ... but I'm sure it will shear considerably in an air-cooled engine ... as it shears in automotive applications as do most PCMOs these days. It's less-than-ideal unless you change it often ... which is not a bad idea.

I also like the idea of using a HDEO in this application ... and 15w40 is what I use in most of my outdoor power equipment. Of course, there is a theory travelling around here that 30 weight oils protect these splash-lubricated engines better than a thicker oil ... but it's still 'just' a theory.

However, the Delo series of oils come in a variety of weights:

http://www.chevron.com/products/prodserv/nafl/farming/content/prodspecs.shtm

However, you'll have to find a local distributor to get most of the (odd) weights.

The 10W-30 looks like it might be ideal for you. I am interested in trying the 0W-30 this winter.

If these are like other weights of Delo400 they won't shear appreciably even under severe use. They will also take any fuel-fouling of the oil better than a PCMO.

--- Bror Jace

 

[Bill Kapaun]

BROR-

I wasn't aware DELO came in other than 30 weight and 15w40, since that was all I'd seen in the stores. (I thought it was a bit odd)

That's why I recommended Chevron Supreme in the 10W-30 as a possibility.

James, maybe tell your son "NO warm up, NO drivy", and use a good 30 weight.

 

[Bror Jace]

Bill, the problem with Chevron is that they do so little marketing.

But that's also a reason you can find a lot of their stuff so cheaply ... at least at the discounters. However, most of their stuff has to come from authorized jobbers/distributors.

Right now, I'm attempting to contact a local distributor ... but disconnected phone numbers don't make that seem too promising.

--- Bror Jace

 

[James408]

Hey guys, thanks for the replies. The first thing I am probably going to do is adjust the throttle linkage so that it is not wide open. This will hopefully stop the miss at high rpm. This miss did not start until I messed with the linkage.

I told my son that he needs to be sure and let the engine warm up first by idling and then making a couple of slow laps around our yard before full throttle. He did not have a problem with this. He knows that if he blows the engine, he is responsible for it. He is also responsible for any parts he may need for the go-kart and gas. The only thing he does not buy is the oil.

Like I said, I use Delo 400 30 wt. in my mowers and I may start using it in the go cart. 30 wt is what is recommended for this engine but I like the idea of the 15w40's extra viscosity for this hard driven tecumseh. Still not sure which one I will stick with.

 

[Propflux01]

I would go with the 15w40, better for 'cold' running, and when it gets warm enough, the 40w portion will do just fine. I would, however, put the linkage back to where it is suposed to be, your child won't be happy, but that engine will!

Myself and a number of people on here use the 15w40's in thier lawn equipment with seemingly good results. As for brand, well, that one is always debateble. I have had good luck with the pennzoil 15w40, but others, of course, swear by brand XXX..I don't think you will go wrong with any brand.