Shell Rotella Engine Teardown
A technician at Clarke Power Services in Greensboro, N.C., re-assembles one of the test engines so it can get back on the road.
This graph of iron wear as determined by used oil analysis shows no difference between the three oils.
Dan Arcy, OEM global technical manager for Shell Rotella, shows how little sludge there is to be found -- on all three engines.
This diagram illustrates how high-temp/high-shear viscosity ratings (expected in the new oil category) compare to traditional SAE viscosity ratings.
This table had parts from a 15w-40 oil used as a baseline/control in the test.
This table had parts from the experimental oil, which had a high-temp/high-shear rating of 3. Lubricant engineers believe the new category will call for a range of 2.9 to 3.2.
More parts from the engine using the experimental oil.
Dan Arcy, OEM global technical manager for Shell Rotella, talks about some of the wear on the parts.
This light box is used to determine laquer levels on the pistons.