That actually WILL void your warranty when you bring her in for burned pistons.halflife1 said:93 octane

Superformance said:What performance mods can I do to my 2005 Mustang GT that will not void my warranty?
Edbert said:That actually WILL void your warranty when you bring her in for burned pistons.
I put dash inserts on mine, that should be warranty-friendly![]()
I8URVTEC said:Dunno if this helps but I was talking a little with the dealer when I picked mine up and he was saying anything with the computer mods (if they catch you) will void the warrenty. He said exhaust mods shouldn't though. Anyway, if something does go wrong the burden of proof is on them to show that your mod caused the damage.
Higher octane burns slower but hotter than a lower octane rating. Going from 87 to 89 is no big deal, just as from 91 to 93; but I would not make the jump from 87 to 93 without a flash/tune. Your AF ratio will be off since the computer was set from the factory to use 87, my dealer told me that running 93 would void the engine's warranty. But in the same conversation they offered me a chip flasher, so go figure.lagamm said:I'm just curious on how higher octane gas will cause burnt pistons.
As I understand it the higher the octane the harder it is to burn (less combustable).
Jenns05Stang said:MAGNUSON-MOSS WARRANTY ACT -- Public Law 93-637 - 15 U.S.C.
Edbert said:Higher octane burns slower but hotter than a lower octane rating. Going from 87 to 89 is no big deal, just as from 91 to 93; but I would not make the jump from 87 to 93 without a flash/tune. Your AF ratio will be off since the computer was set from the factory to use 87, my dealer told me that running 93 would void the engine's warranty. But in the same conversation they offered me a chip flasher, so go figure.
BTW, my 97 Cobra ran like arse on 91 octane...it did NEED the 93.