I recently started filling gas tank with Shell V-Power gas. She really seems to like it alot. This was aprox. 3 weeks ago and I have definately noticed a huge loss of MPG. I can deal with that , the strange thing is everytime I refuel, The first crank is always like a missfire. It seems to barely start and sometimes is doesn't. The second key is fine. All other start ups are fine, it fires perfectly except after refueling. WTF!!!!!!!!!!!!! Need some help pls!

 

I dunno what could be causing that, but assuming your engine is an LQ4, you're not running FI, and you don't have a high octane tune, you are definitely wasting your money on anything other than regular unleaded.

 

I think Shell gas sux a$$.

 

try a different gas. chevron is what i like. no need in high octane gas for stock tuning.