I still use Mobil1 and really have no complaints about it. I also use the larger Wix filter

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Dthreap wrote:

Yeah make sure your O2 isn't behind lazy, you want nice up and down.

Planeboy18 wrote:

^^Pro tip for more than just O2 sensor signals

I wouldn't put royal purple in my lawn mower let alone my car. Too many claims about their oil have been proven to be false.

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Bright Red 2008 G8 GT

Mods: DRCUSTOMPARTS Center Gauge Bezel
Superchips ECM/TCM Tune- Volant CAI
Solo Axlebacks - HID's
Holden V8 Badges
My Website

i've noticed a difference over mobile 1 synthetic after using it over 70k miles

Amsoil here

Castrol Edge Titanium 5w-30 here

switched from 87 octane to 91, then from 10w-30 reg to 5w-30 reg to 5w-30 synthetic, and noticed a mpg improvement and a bit more performance, and this is coming from a car that has almost 530,000Km (329,000Miles) now tuned and even better

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1997 Pontiac Grand Prix GTP Sedan HEAVILY ARMED by VIPER
18" KV5, Lowered, SpyderAuto Lighting, HID's, Custom Grills, SD Hood, SLP Gen1, Roof Rails, CAI, GXP seats, U-bend delete, Aeroforce, Carbon Fiber Dash and Pillars, LE Cluster, Overkill Tuned