CMF Veteran Member
Join Date: Jul 2008
Location: Beverly Hills, Florida
Re: What type of fuel do you use? (Eco model)
Your thinking very old school about the whole situation. Back in the day, it may have been better. You even used to be able to put race fuel in and see the benefits. However, now a days, it is a whole different story.
The engines are built to specs within 0.001", making them optimal under certain conditions. The perfect amount of voltage is applied to the spark plug and the area of the cylinder is honed to ignite fuel at 87 octane. Anything above essentially becomes useless, as it is outside of the useable range. That means that the additional 5 degrees of octane is a waste, as it actually doesn't properly get ignited within the cylinder.
Stick with 87, you will have the best results. Any increase you saw was strictly driver input based. I assume that this information is based upon 1, maybe 2 trips. And the drop in power you experienced was probably caused by the 180 horsepower engine in the family sedan you drive, not the fuel.
Trust me, they pay people hundred of thousands of dollars each year to ensure that your engine runs best with the fuel octane level designed for it, unlike the days of yester when it was just gas.
My Malibu Family:
- 2016 Malibu Premier 2.0T - 4% Tint, all windows, Debadged, Metallic Black painted emblems
- 2013 Malibu LTZ - 5% Tint, all windows, K&N Air Intake system, all Interior/Exterior bulbs switched to LED, Tinted taillights
- 2008 Malibu LTZ - 20", 8k/3k HIDS, Exhaust, Cold Air Intake, 8% Tint
Old Truck: 2011 F150 Twin Turbo
- Electric dump, Intake, 10,000 lumens of Rigid LED lights