I ran Map 3 with e30 on my JB4 this summer for a month or so. Car ran amazing and was noticeably faster than Map 2 with 93. I switched back to 93 and Map 2 when it started to get cold out and traction became an issue.Is anyone out there using E30 fuel? Or does anyone know if using E30 is safe for the car?
~85% ethanol and ~30% gasoline are exponential jumps in alcohol content. The long term use is the issue and is widely understood. The LPFP and HPFP aren't the issue either but the seals and lubrication in both as well. They won't take the constant use over a long period of time. Then there's the individual owners warranty to consider. Running anything beyond 15% ethanol blend, is a big no with the dealership and manufacturer. Such damage can happen in a little as 35K or less which is not uncommon.I know they say it will dry out seals and the fuel lines but in all honesty the jump from 10% to 30% is so minor most people won’t own the car long enough for something like a seal to wear out..
Ethanol has a corrosive action on fuel-system components, magnesium, aluminium and rubber. e85 has a short storage and tank life, because its prone to absorb moisture from the air. It also means that depending on how long the gas stays in your tank or the humidity level of your geographic area, you can experience poor performance and even problems with fuel injectors. Due to its ethanol component, it's more likely to ignite before the piston compresses (predetonation) and the spark plug does its job.
Due to its corrosive nature and as we mentioned here before... E85 affects fuel system components, magnesium, aluminium, rubber hoses, gaskets and paper fuel filters. Another important detail to factor in is that the fuel pump usually has gas flowing around the pump and motor mechanism that lubricates it. This isn't the case of E85 fuels, because they lack this important lubrication component. The electric fuel pump can fail sooner than normal due to this lack of lubrication plus the fact that it's working harder to pump 20-30% more fuel for the same travel distance.
There is tons of information regarding the use of e30 and e85. Most, simply state in the beginning, "DON"T DO IT!"