It seems so unreal to me that some cars become very sluggish after GC is put in them. Maybe it can be noticeable in a light car with a small engine. I have a Honda Element (heavy and does not get great mileage anyway – like the CRV) with the 2.4, and GC made the engine sound better at high RPM...
1996 Pontiac Trans Am - when I used M1 5-30, the valve train sounded harsh and made me nervous at the stock 5800 rpm rev limit. With GC, the engine sounds and feels so much more solid at high rpm, that I reprogrammmed my rev limiter to 6200. At the drag strip, it's almost a tenth quicker since I...
Makes me wonder if the formula was changed long before they stopped adding the dye. It seems to be assumed any formula changes coinside with the color change.
Is it known if the green GC is dyed or is the color a natural result of its formulation? If it's natual, I would guess that maybe the green and gold formulations are not as close.
I put GC in my Honda element. I had run only 5W-20 Penz in it before. The car did not lose any gas mileage - maybe partly because I drive the car hard and never got great mileage. Engine really does seem to run smoother - especially at high RPM.