RWJon Posted February 21, 2011 Report Share Posted February 21, 2011 Gased up my '11 350 'R' tune yesterday...with 89 octane gasoline. Not on purpose, mind you. Did not realize what I was doing untli 'she' was full. I was going to siphon as much as possible out, but the capless filler neck seems to have a locking divice on it which prohibits my getting a siphon tube into the tank. I was planning on keeping the speed and rpms down and as I used up quarter tanks worth of gas, replacing with 93 octane. Would I be better putting a fuel octane aditive into the tank? Any thoughts would be greatly appreciated. Thanks, ciao and God bless...Jon Link to comment Share on other sites More sharing options...
MYGT350 Posted February 21, 2011 Report Share Posted February 21, 2011 Gased up my '11 350 'R' tune yesterday...with 89 octane gasoline. Not on purpose, mind you. Did not realize what I was doing untli 'she' was full. I was going to siphon as much as possible out, but the capless filler neck seems to have a locking divice on it which prohibits my getting a siphon tube into the tank. I was planning on keeping the speed and rpms down and as I used up quarter tanks worth of gas, replacing with 93 octane. Would I be better putting a fuel octane aditive into the tank? Any thoughts would be greatly appreciated. Thanks, ciao and God bless...Jon Jon, You might try to add an octane booster to your tank but to play it safe, I would call Roger at SA and get their expert advice on the best course of action to take. Link to comment Share on other sites More sharing options...
sportscars Posted February 21, 2011 Report Share Posted February 21, 2011 You can add octane boost to your tank or you can disconnect the fuel line at the filter and let the fuel pump pump the gas out (that will take a while however). I believe these cars have built in knock sensors so it should pull timing if you start to knock due to the lower octane. Link to comment Share on other sites More sharing options...
shel-b001 Posted February 21, 2011 Report Share Posted February 21, 2011 Octane booster burn it off to half a tank & then top her with the highest Octane you can find. Link to comment Share on other sites More sharing options...
RWJon Posted February 22, 2011 Author Report Share Posted February 22, 2011 Thanks, all, for your thoughts. I am going to give Roger a call, and will probably be adding octane boost as well as adding 93+ octane to the tank as the kneedle goes down. Again, thank you all. Ciao and God bless...Jon Link to comment Share on other sites More sharing options...
DubbsFaris Posted February 23, 2011 Report Share Posted February 23, 2011 Yeah, I have spoke with a few people and while the car does pull the timing in the event of bad gas or under rated octane, you should be okay. That said- I have been warned by a couple guys at Ford Racing to NOT run racing fuel on the "R tune". They do not recommend it, and discouraged me personally from doing it at this time. Link to comment Share on other sites More sharing options...
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