Have a 2008 Honda with 145k that is consuming oil. I have used Mobil 1 synthetic, redline, royal purple, valvoline synthetic, valvoline high mileage synthetic etc. All oils seem to be consumed about the same. Mostly used 5w-20, 0w-20, even tried 5w-30. Would consume about 1qt per oil change. I thought I might try some Valvoline Synblend high mileage 10w-30 but it seems to be consumed even faster about half a qt after just 1000 miles. this seems very excessive. Any advice or recommendations? I may just switch back to 5w-20 valvoline synthetic or synblend high mileage as it doesn't seem to make a difference anymore. Thanks