409,000 miles without an oil change!!!!
Colonial Heights, Virginia- "I didn't see any surprises in there at all," said owner/operator Haywood Gray of his 1990 Mack E7-400 engine.
Using AMSOIL Synthetic 15W-40 Heavy Duty Diesel and Marine Oil and the AMSOIL By-Pass Oil Filter, Gray ran the engine 409,000 miles without once changing the oil.
When the E7-400 engine was torn down by the local Mack dealership and its parts examined by an independent certified engine rater, it showed light to moderate wear throughout. In fact, according to the engine rater, the parts could have been put right back into the engine. "I see no reason why the engine couldn't run on," he said. Oil analysis confirmed the rater's findings: the sample of used AMSOIL Synthetic 15W-40 Heavy Duty Diesel and Marine Oil contained 1/6th the lead and 1/3rd the iron allowed by Mack condemnation limits... after 409,000 miles without an oil change. That's protection - that's AMSOIL!
Gray began using AMSOIL Synthetic Heavy-Duty Diesel and Marine 15W-40 Motor Oil (AME) in the E9-400 V-8 engine of his first truck, a 1984 Mack, after the engine accumulated 45,000 miles. For 280,000 miles, Gray changed his oil at 40,000- to 60,000-mile intervals though his oil analysis reports showed, without exception, that the oil was good for continued use. At 325,000 miles, Gray increased his oil drain interval to 100,000 miles.
The engine was torn down at 600,000 miles when Gray decided to sell the truck. The cylinder linings, bearings, pistons, rings and pump, all treated to extended oil drain intervals with AMSOIL, were found to be in excellent condition.