Unfortunately direct injection engines hit the market before they started making changes to motor oil. Also in my personal opinion I believe we need to put more additives in gasoline. With direct injection engines being the norm and those injectors having to go through nasty conditions gasoline needs to change for them.
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I realize that our whole system is NOT an early VDub D.I. level injection setup.
But after seeing those injectors/valves/ports above,
if it were not for the OBD2 plug-in inspection we must go through every year here, it makes me want to get an auxiliary 4 port injection setup and an integrated stand alone ECM to properly run/coordinate the whole thing.
BTW; I use 5 ounces of Red Line SI-1 injector cleaner (which has one of the highest concentrations of polyether amines of all of the available injector cleaners on the market) every third fill-up (with Shell VPower 93), and a WHOLE bottle (15 ounces) in the tank fill-up right before an oil change (with the lowest volatility, lowest sulfated ash/calcium containing, SN++ rated, Dexos 1 gen 2) FULLY synthetic, i.e.;
all Group 4/5 oil I can find.
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