Never. Just use Premium Grade Major Brand Gas at every fill up. All Major Brand Gas have enough additive Cleaners in their Premiums that you do not need to use an off the shelf cleaner. I use the same Name Brand Premium in all of my vehicles ever since I can remember, and I have never suffered a fuel system problem.
__________________
BD2ZBN :: 2011 BSM/TRG/SP/6MT/Stillen Oil Cooler/K&N CAI/Michelin PSS/Brake Light/EIBACH Sway Bars/FI Res. HFC+18" Res. CBE/Morimoto XB LED/DRLs/10mm Spacers
|