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I'm 4200 miles into a 5K run with SynPower 5W20 in 3.0L app at 31K miles on odimeter.
Two things are very weird. I need to do another run with MC reference oil to validate what's going on so this data may be useless by itself.
Oil Consumption has started. It looks like it could be down 1/2 qt at 4140 miles. The previous run with QS Q-T was off 4qt and the PP before that was zero loss, both at 5K.
MPG over the first 3125 miles of the run was 20.6 (152g or about 8 tanks). QS and PP runs were 19.3 and 18.9 respectively over 5K miles. During last 1016 miles on hwy trip MPG was 23.1, previous trip high was 21.6.
One last thing. I had the low oil pressure light go on for less than 1/2 second yesterday when starting.
As I said, very wierd at 31K miles.