After 5 years / 60,000km, I decided it was time to try Auto-RX on a Suzuki Grand Vitara V6. This vehicle has always used synthetics. Dealer uses Shell Helix Ultra 15w50 and subsequently 5w40 for 10,000km intervals. After the 3 year warranty expired, I did my own oil changes and used Castrol SLX 0w30 subsequently. For this cleaning phase I used fresh Castrol GTX 15w40 with a brand new OEM filter and drove for 2500km / 3months. I decided to cut open the oil filter and see for myself (seeing is believing right?) what the oil filter picks up. I am truely amazed with ARX and am convinced it is the safest cleaner to use. There were goobs of sludge picked up between the pleats of the filter. I never imagined a vehicle using synthetic all its life will still have so much sludge buildup inside. Here are the pics. I am now on the rinse phase with fresh Castrol GTX and another fresh oil filter. I may just cut open the oil filter again and see what the rinse phase picks up.



