Motul 510 or 710?

[sperera]

Has anyone used MOTUL 510 or 710 in their gasser?

I am considering buying one of these but not sure which one. Bike shop tells me the 510 is a blend of synthetic and mineral and the 710 is fully synthetic.

Both are with out ester.

Any advise or recomendations?

 

[zouz10]

i'd go with the full synthetic. i run castrol full synthetic for 2 stroke motors and it's worked great for the past couple of years.

Just make sure you keep the 25:1 ratio and you'll be fine.


Chris

 

[sperera]

I ended up buying the motul 800 with is 100% synthetic with ester.

Do you think I should still stick to the 25:1 ratio?

 

[zouz10]

Yes stick with the 25:1 ratio. You can't go wrong with that. The boat guys use 16:1 but i always used 25:1 in my cars without any issues.


Chris

 

[sperera]

Thanks thats what I will do.

Have you seen the FG DVD that comes with the kits?

It says to use 125ml to 5l of fuel and they reckon thats a 25:1 ratio.

Strange they made such a basic mistake.

Oh well.

 

[mattc]

125ml-5ltrs is the mix for Cobra oil and that's what I've been doing, does this mean I've made a basic error?
Matt.

 

[voo2doo]

No Matt,thats 25/1 mix.
J.

 

[mattc]

No Matt,thats 25/1 mix.
J.

Phew, I was never any good at maths.....:blush:
Matt.

 

[voo2doo]

Thanks thats what I will do.

Have you seen the FG DVD that comes with the kits?

It says to use 125ml to 5l of fuel and they reckon thats a 25:1 ratio.

Strange they made such a basic mistake.

Oh well.

Where was the "basic mistake" ?

 

[Bigger the Better]

Where was the "basic mistake" ?

125ml to 5L = 40:1

That's 40:1 isn't it?

I think we noticed that issue once before in a thread?

 

[Bigger the Better]

Yup: https://www.largescaleforums.com/showthread.php?t=4545&highlight=oil+ratio

 

[sperera]

good I wasnt halucinating it was a mistake.

I just got my fuel ready for weekend. 200 ml MOTUL and 5L BP Ultimate 98RON

 

[sperera]

Where was the "basic mistake" ?

125ml to 5litres fuel works out to be 40:1 mix.

According to printed manual and all the info on forums it should be a 25:1 mix which works out to be 200ml per 5L fuel

 

[dwarfy]

200ml per 5l is correct for 25:1.

5000ml of fuel / 25 ratio = 200ml of oil
5000ml of fuel / 32 ratio = 156ml of oil
5000ml of fuel / 40 ratio = 125ml of oil

 

[mattc]

AARRRGGGHHHH, So I guess most people are running 25:1? Why does the Cobra bottles say 40:1?
matt.

 

[Bigger the Better]

All 2 stroke applications will differ. If you have run at 40:1 just switch to 25:1. You will be ok from 25:1 TO 30:1 In my opinion.

I run all mine at 25:1.:cool2:

 

[sperera]

Agree. I think most of our engine will handle 40:1 but this may cause a little excess wear/heat. It may give you slightly more power, and I mean slightly but in the interest of long service life and keeping it cool stick to 25:1

 

[atom3624]

So why does FG Modellsport on their official DVD state quite categorically that you MUST NOT CHANGE FROM 40:1 (125mL to 5L), basically that if you do, you void your warranty (its on the DVD !! :blush: ) ?

 

[sperera]

I believe its because of the oil they recomend.

Been doing a bit of digging on this and another forum advises they the panolin oil you can use a 40:1 mix. this is the brand of oil FG recomend but I haven't seen any here in Australia.

Allot of people seem to run 25:1 in these things and they seem to run for a long time so thats what I will stick to I think.

 

[atom3624]

I'm certain there's been a post on the subject somewhere, but has anybody established just what can be gained, by leaning off the oil in the mixture?

It's a given that adding oil certainly permits additional lubrication, thus longevity. But just what is being lost?

Personally, I'm new to 'large scale petrol', but not to nitro. I'm using Castrol fully synthetic 2-stroke oil, as it appeared the best available when I popped into Halfords.
I was told 32:1 by the previous owner, who mentioned the FG 40:1, but best steering clear of that, to save the engine. 32:1 is what I've maintained, but I haven't run it that much. Perhaps 1 gallon so far.