AMSOIL was extensively tested in a fleet of New York City Taxi Cabs. Four test groups were set up. Group 1 used a good quality petroleum Oil and that oil was changed every 3,000 miles. Group 2 used AMSOIL 10W-40 Engine Oil and AMSOIL Air and Oil filters changed at 6,000 miles for the duration of the test. Group 3 used the same AMSOIL and Filters and was changed every 12,000 miles and Group 4 used Amsoil 10W-40 with AMSOIL Air Filter and the AMSOIL By-Pass Filter System. The By-Pass Filter Element was changed every 12,000 miles. The test was run for 1 year.
As the pictures demonstrate, AMSOIL performed far better than the conventional oil in many ways. Note the pistons in group A (petroleum oil)... the piston skirts are covered with varnish and there is heavy carbon around the rings. Group B, C, and D show no such build up and actually the cleanest pistons are in group D the cars that used the By-Pass Filter and no oil change for 60,000 miles!
Looking at the pictures of the valves again shows how AMSOIL keeps the engine clean. The petroleum lubricated engines show a heavy carbon build up around valve tops and again, group D (60,000 miles with no oil change) valves are the cleanest.
"I believe the general conclusion that your 'four times normal drain' engines, i.e., 3,000 x 4, appeared as clear as our mineral oil 'normal drain' engines, is testimonial to your oil in spite of the unanticipated severity of the General Motors 3.8 liter engine." ~ Comment by the Testing Facility
I don't think anybody can argue the fact that AMSOIL FAR OUTPERFORMS ANY OTHER OIL ON THE MARKET! Pictures are worth a thousand words. When are you going to start using the best oil in the World?
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