Originally Posted By: Audi Junkie
I just don't want any regrets if I buy cheap super 93 over TT, mixed to 91-ish or Sunoco 91, which I get cheap from a rebate programme. My grocery shopping card is loaded to get $.60c off right now, usually less though.
The jist of the posts so far is that there IS NO difference in brand quality...?
All I care about is intake valve deposits on my DI turbo. I understand low grade gas may be to blame, when it flashes off the hot intake valves during VVT overlap.
Are you sure you understand how "direct injection" works?
The problem with intake valve deposits on the DI engines is due to the crankcase vapors that are recirculated by the PCV system, not due to low quality gas.
The fuel gets nowhere near the sites where the intake valve deposits form (unless you're hoping that it somehow survives the combustion process and is recirculated to the valves via the PCV system - highly unlikely).
If I was you I would worry about using an oil that has low volatility and will stand up to the fuel dilution.
It is brave to essentially void your warranty by installing the ecu tune on that engine.
I just don't want any regrets if I buy cheap super 93 over TT, mixed to 91-ish or Sunoco 91, which I get cheap from a rebate programme. My grocery shopping card is loaded to get $.60c off right now, usually less though.
The jist of the posts so far is that there IS NO difference in brand quality...?
All I care about is intake valve deposits on my DI turbo. I understand low grade gas may be to blame, when it flashes off the hot intake valves during VVT overlap.
Are you sure you understand how "direct injection" works?
The problem with intake valve deposits on the DI engines is due to the crankcase vapors that are recirculated by the PCV system, not due to low quality gas.
The fuel gets nowhere near the sites where the intake valve deposits form (unless you're hoping that it somehow survives the combustion process and is recirculated to the valves via the PCV system - highly unlikely).
If I was you I would worry about using an oil that has low volatility and will stand up to the fuel dilution.
It is brave to essentially void your warranty by installing the ecu tune on that engine.