A DROP OF X1R IS DRIPPED INTO THE 5W-40 TEST IN PROGRESS
PENNZOIL TESTED WITH THE X1R
VALVOLINE RACING VR1 20W-50 WITHOUT X1R AND WITH X1R!!
Top class SAE 20W-50 Racing oil in Valvoline Racing VR1 test as requested without X1R and with X1R. This test brings out the characteristics of the X1R really well and you can see it in the notch in the tread after the test!!
KENDALL GREEN RACING WITHOUT X1R AND WITH X1R
Two of the toughest in their class Kendall Green Racing 20W-50 and X1R oil additive. I'm testing Kendall with only & X1R