Fuel Additives
 

Anyone use them? Or are Fuel Additives & Fuel injection cleaners a big no-no with our no piston engine?

i drove up to fresno 350 miles with no additive about 18.5 mpg on the way home i put in the stp made with real jet fuel additive stuff and got 21 mpg when i got back to san diego both ways traveling between 75-90 depending where i was going 90 south of the grapevine = big no no but north of the grapevine its fine

fuel additives like octane boosters and stabilizers are basically worthless, the best one to use is chevron's concentrated techron for engine cleaning power, otherwise you really don't gain anything of value from them. Most oil additives are also pretty much worthless, especially the ones with hyped up claims like slick 50 and prolong

I use Marvel Mystery Oil in my saturn's fuel for extra lubrication, but a 4 oz. bottle of 2 stroke mix oil in your fuel is best for the rotary.

here, go to this link, it's fun

http://www.fuelsaving.info/fuel_additives.htm

i use sugar

that just makes the car even more sweet

Every few tanks I put in a octane booster. I am not sure if it works all that well but I figure its just $3. Only thing a mechanic friend told me is to not to use them ALL the time.

Once I had to go to the bathroom and none were around so I took a leak into the tank and now the car goes like piss.

I use Yamaha Ring Free every oil change (2oz dose) to help keep carbon buildup away. I rev the car enough that I probably don't have to worry about it, but it can't hurt. You can pick it up at your local marine/outboard store. It's about $10-12 for a 12oz bottle (iirc) and that'll last most people around a year.

Fuel injector cleaner once every few months. I can tell the difference afterwards.

To be serious for a moment (but only a moment), most of these things are various formulations of snake oil and some of them (those that contain Teflon) can actually do harm. The only thing for which I have ever seen clear evidence of some positive impact is Techron and even that was no great shakes.

I use a bottle of Techron in the gas tank after each oil change. Dealer says it should help with carbon build-up. I do it anyway.

So it just dribbles out, and burns like hell?

I agree with daisuke & therm8. The Yamaha ring free is actually the same stuff as techron, but more concentrated. The 2 stroke outboard has a problem with carbon build up when run continusly hard, like on a big boat. Yamaha tested many chemicles and found the techron was best. Only negitive has been it will clean junk out of the fuel tank and plug the fuel filter on older tanks.

I don't know what women you hang out with but you might want to be more selective. :lol2:

I was having trouble with my engine running rough, loss of power, and hesitation. I thought it was time to change the coils, plugs, and wires, but I tried an additive while waiting for the parts to arrive. This stuff miraculously made my engine run smooth again. I am not trying to sell it, just telling you that it worked for me.

http://lucasoil.hodgsoncorp.com/luca..._treatment.htm

44K periodically

huh?

BG has a product called 44K; works real good! Google it.

Cool, thanks. BTW, found the official link to Lucas fuel additive:
http://www.lucasoil.com/products/dis...tid=2&loc=show

http://4imgs.com/318/Idemitsu/premixl.gif

The only thing you need to mix with your fuel :)
I use this religiously at every fill-up

I use the Redline stuff occasionally.

not really,

great stuff, but it is not a cleaner!

b@g 44k is great stuff!!!!!! i use it about every 10k miles.

beers :beer:

Here is a list to consider

https://www.rx8club.com/showpost.php...&postcount=968

And here is my post on the two different recommendations I have depending on your priority - I chose to stick with MMO as my premix since I have Idemitsu Rotary Premix being feed into the engine through the OMP as well - kinda the best of both worlds for those that have a Sohn adapter.

https://www.rx8club.com/showpost.php...&postcount=997

Regarding any Octane or "power" booster additives, I saw a really good segment on Fifth Gear once - they did very stringent laboratory testing on a few engines with different additives. NONE of them increased horsepower, and most of them decreased power by a few HP. None of them increased fuel economy, either. It was hypothesized that all they were basically doing was diluting the gasoline!! (And note that these additives are all more expensive, per volume, than gasoline.) Summary: don't bother with any "power" type fuel additives....they do nothing.

As far as additives for lubrication purposes.....well there are plenty of threads on that.

Lubrication and detergents, those are two additives I think we can benefit from. I had some fouling which is why I added the fuel treatment, but I think my underlying cause may be that I need to change the coils and plug wires. The car started feeling a little rough again yesterday after redlining it in 1st and 2nd gears, but not as bad. I think the heat is affecting the coils as they have 78k miles on them. I'll post my results on the DIY forum after I change them tomorrow. The treatment seemed to help initially though, which is why i posted to this 'Fuel Additive' thread.