Just sharing a tip here, every other friday or so I stop by DynoComp in Scottsdale AZ and get 3 or 4 gallons of 109 and mix it with my full tank. While I haven't dyno'd my car with it, feels like it easily adds 50 more HP. This could be my imagination or reality, not sure but it's a fun, "Treat" I do for myself every once and while.

If you never fed your, "Beast" 109 octane gas, do it once and you will be amazed!

Tomorrow I'll do a 0-150MPH romp in .6 of a mile show you the ferocity this unleashes.

Happy New Year Everyone!

Alex

I hope you know MS109 is oxygenated and will lean you out a good amount. It's best to only use it if you are tuned for it. A friend of mine ran his turbo ls2 GTO on MS109 and he said it was dangerous lean just from going to that from 93 pump. If your mixing it with 10 gallons of pump I would think you would be ok though

It'll run somewhat leaner, but it's also much higher in octane. Perfectly safe.

Higher octane dosent fix running too lean. When Jeremy tuned my car he said "make sure you don't run 109 before getting another tune for it"

It'll lean it out a little, it's not a huge difference. I've run it before on most my cars and it's not a big deal.

high octane wont fix lean it helps with detonation. if your not tuned for it you can actually lose hp as your burning the fuel after the optimum spark as it takes longer for high octane fuel to burn

Unless your knock sensors are reporting a knock and the ECU is pulling timing higher octane will do nothing for you.

VP Racing says this about MS109 though

http://www.vpracingfuels.com/vp-racing-fuels.html

"MotorSport 109™
In engines that can run on pump gas, MS109 is a direct replacement that produces more power than any other unleaded fuel - up to 5% more than premium unleaded. Recommended for applications with up to 25 lbs of boost and naturally aspirated engines with CRs up to 15:1. Compared to other unleaded fuels, MS109 offers better detonation protection as well. Excellent in crate engine applications."

Not sure how they are coming up with this but I am curious about the claims. It's unleaded so shouldn't hurt anything to run this. I could see the computer getting used to not having to pull timing (if it is pulling it) then regular 92/93 going back in and causing a lil knock before the computer compensates.

• Motor Octane 101
• Research Octane: 109
• R+M/2: 105

Basically I think the extra power is mostly a placebo effect, but probably won't hurt anything. Smells nice though.

I would say safe to do this.. Actually i would say its prob safer then running pure 93 that you get at the pump... Because who knows exactly if that's 93 or 91 and a half or what...

I am sure the car feels better because the ECU tunes the knock threshold up and you are actually making more power... Porsche ECU and BMW ECU are very good at adapting to gas... I am sure Benz is the same...

Thanks peeps for the advice. I have Jerry's Stage 3 tune but I'm not sure if that impacts anything when it comes to higher Octane or adjusts the timing a bit?

In AZ the highest we can get is 91 so with 4 gallons of 109 it probablly mixes to 93 maybe 95?

It does feel MUCH stronger for what it's worth and I'll try and do a recorded 0-150 MPH blast to show you.

Thanks as always.

Alex

if 4 gallons helps that much, you must be seeing a bunch of knock retard on pump.

Ive ran MS109 a few times and it burned out one of my O2 sensors.

I tend to agree with this but on my previous cars I have also felt them somewhat quicker ( not 50hp) and they had zero knock retard. I know that stoich is different on MS109 ( something like 13.8 or whatever ). I have no numbers to share but I did feel the car quick enough to keep using it over and over. It's hella expensive though so I have yet to try it on my e55.

It shouldn't, it's unleaded.

instaed of running 109 high octane at approx 12$ per gal. try the torco fuel additive instead. by mixing 1 qt at 22$ to 5 gals 93 octane you get 105 octane. works pretty good its what bruce runs in the 10.5 record holding e55

I say no to any "octane booster"


He is also getting these gains across the curve instead of just peak power... Which will make the butt dyno feel even better...

The Torco octane booster is great. I use it on my dirt bikes with 14.5-1 pistons when we do are annual trail ride. Can't beat bringing a bottle to make real race fuel out of crap pump gas. I'm sure other people on here have used it before.

Try c16 with open headers smells soooooo good.

I think someone needs to do a race tune for Q16. The stuff makes 100+ hp on big turbo pro mods when changing from C16 to Q16. I bet it would be worth a solid 75hp with a tune made just for it over MS103 or MS109. It's oxygenated also and you can run a ton of timing with it.

its not an octane booster rather a fuel additive. read the can. and for me if its good enough for TTM its good enough for me!

True, I guess the O2 went out because I poured in unmixed MS109.

https://mbworld.org/forums/c63-amg-w...500-miles.html

That's odd...I've never had an 02 sensor go bad and I even mixed leaded fuels sometimes on my cars with no issues. I was told that leaded will kill 02 sensors if used often, which I didn't, but It's the first time I read about non-leaded killing an 02 sensor. I dunno what to say...

The octane booster you get at the parts store, even the "off road only" marketing BS stuff that raises your octane "4 points" or "8 points" or whatever.... What they mean is your 93 octane becomes 93.4 or 93.8 True story.

The only off-the-shelf octane booster that I know worked great in the past was 104+ Octane booster. A quick search shows that it is still made, and they claim it is safe for all vehicles, catalytic converters, and O2 sensors. I've never tried it in my E63 though.

what you say is correct. but the torco fuel additive cant be bought at a parts store unless they are adistributor for torco fuel itself and i dont know of any parts place that sells it. race shops and oil companys do. i have 4 qts of torco sitting on my bench and the ratio yields either 102 or 105 octane depending on the 5 or 10 gal. mix with 93

I have used the Black 104 octane booster in my race car before with adjustable timing. It was/is as good as turbo blue unleaded, aka 100 octane race fuel. How I know this is at the track I could run just as much timing as the turbo blue. Difference was/is Turbo blue was $7 a gallon, where as the the Black 104 bottle was only $9 bucks.

I now use that little bottle ANYTIME I am racing my S600 just for a little added insurance.

As far as this motor was concerned, BOTH made the same power. Neither EVER hurt my 02 sensors, and both had a lovely smell with No cats.

Hence I believe it 104 octane booster, take it for what its worth.