Join Date: Dec 2000
Location: Monroe, WA, USA
the flush is a good idea, but rember on a motor with over ohhh about 50,000 mile's it is wiser to use a synth blend.
the longer a motor is run on regular dyno juice the less it will like full synth. mainly the seal's and stuff.
also if you go full synth for a decent amount of time it is not a good idea to go back to regular oil. the motor will not like it! and start to fail. i have read this from various oil company training stuff.
a synth blend will give you most of the benifit's of full synth except the extended chage time. and is about half the cost of full synth.
the 2 best thing's about full synth is the cling factor, it like's to cling to the bearing's better. and the heat factor, it can withstand higher heat better.
power gain's are debatable i have heard it go both way's. but if you have a low milage motor, i would recomend under 20,000 mile's, it is a good idea because ware is just about eliminated with full synth. i have seen motor's go in excess of 300,000 mile's on full synth. full sunth was put in after motor break-in.
in a over the road truck, class diesel tractor, the use of full synth basicaly make's the motor last forever. this is from test's done by Cummins, detrote diesel, and cat. for a owner operator it is a god send, for the part's maker's well they hate it!LOL
a flush is not needed on a very low milage, under 10,000 mile's, or a new freshly broke in motor.
hey big gear head do you agree with this? you are a dist. for amsoil, the best IMHO of all the synth maker's.