Got a 2006 XC90 2.5T AWD w/36k on monday.There is some varnish on the dipstick and oil filler cap, no signs of sludge. Is it worth doing a basic application or just go straight to a maintenance dose to clean up the varnish?
Originally Posted By: tom slick
either of you two want to divulge which product you are talking about? or has this forum gone to one product so far that it is implied?
Originally Posted By: tom slick
either of you two want to divulge which product you are talking about? or has this forum gone to one product so far that it is implied?
I think it may depend more on interval, temp, and type of oil than total mileage. I first noticed it in one of my engines at just less than 50K (the time of purchase) so it may have been there longer.