I know Pscholte may not like this.... but: I have a 1995 325i convertible that is near the end of the ARX rinse phase. I ~want~ to use GC but keep coming back to the 'its too thin' '3.5 HTHS is the minimum', 'but its ACEA A-3 rated and suggested for use in some European markets' debate. Engine has 152K on it and we've had it for 6 weeks. The ARX really brought the engine back to top shape. Engine runs great, no oil consumption with Maxlife 10W-40 over 1500 miles of rinse cycle... even in the 105 degree heat. Some posts on this subject have been to the effect that GC will be OK but there may be oil consumption with 0W-30 instead of 10W-40 or 15W-40. I wonder if I should use VSOT or Redline 10W-40 with the GC to thicken up the oil a little bit. This might be closer to the oil viscosity chart in the owner's manual. How about 5 quarts GC to 1.8 quarts of Redline 10W-40 and a 7K to 10K OCI with LC-20 and FP60?