I watched that doc when it was on the other night, in fact twice. What it did test was a Cruz and they spoke to most cars. Ultimately the point was to check your owners manual for the 2.4 it says use 87, for the 3.6 says you can use 87 but for best performance use 89. I actually did a better job testing with my car than the report, ran a few tanks on 87, then tested at 89, got better mileage, which made the extra cost equal the mileage.
If you have a 2.4 don't buy premium, if you have a 6, its up to you, but makes sense to use 89.
... and the only thing I'll add is that for the V6 don't pay extra for 91 or 93 unless 87 is the only other choice.
(Still watching the documentary. Thanks for the link, Elvis!)
'11 LTZ, born Aug 2010, Fairfax, KS
V6/A6, Red Jewel Tintcoat / Cocoa-Cashmere, Sunroof
Cool Mods: Drop-in K&N air filter; 20% tint, DRLs on turn signals,
Painted grilles, 1-wipe washer, WeatherTech mats, CHMSL Pulser
Wow they are charging 36cents a gallon more for 89 near you? Thats insane! Around here its only 10-15cents more. I run 91 only because Sam's Club where I work only has 87 and 91, and its only 20cents more, and still way cheaper than other gas stations 89.
2009 Summit White LT2 3.6L V6
Factory Fog Lights Added
2009 Performance Red Metallic Pontiac G6 2.4L 6Spd
Factory Fogs added
Black SPO Upper and Lower Grilles
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