Originally Posted By: KrisZ
Originally Posted By: buster
The results show the PU/PP do very well at preventing high temperature deposits and varnish.
How can you relate deposit prevention with deposit cleaning? Regular gasoline is an excellent deposit cleaner, would it pass deposit prevention test?
Hence my comment about HTO-06 spec, some marketing genius put these two together and viola, we get this marketing baloney.
http://www.swri.org/4org/d08/gastests/iiigtest/
300F for 100 hrs, interrupted every 20 hours for oil level check.
Quote:
Sequence IIIG Test Equipment and Procedure
The Sequence IIIG test uses a 1996/1997 231 CID (3,800 cc) Series II General Motors V-6 fuel-injected gasoline engine.
Using unleaded gasoline, the engine runs a 10-minute initial oil-leveling procedure followed by a 15-minute slow ramp up to speed and load conditions. The engine then operates at 125 bhp, 3,600 rpm, and 150 °C oil temperature for 100 hours, interrupted at 20-hour intervals for oil level checks.
Sequence IIIG Test Results
At test end:
All six pistons are inspected for deposits and varnish.
Cam lobes and lifters are measured for wear.
Kinematic viscosity increase (percent increase) at 40°C is compared to a new oil baseline every 20 hours.
Wear metals Cu, Pb, and Fe, are evaluated.