Been noticing in UOAs that the flashpoint GC often drops down to 380F-340F after about 5k. IIRC the flashpoint of GC when new is 440F+.
Perhaps this isn't important when the engine is running, but I'm a bit concerned when the engine is shut off after normal or hard driving.
The engine does have an afterrun coolant pump which reverses coolant flow through the turbo after shut-off and pumps coolant from the radiator into the turbo in order to help prevent coking & deposits from forming on the shaft.
The car in question is a 2006 Audi A3 with the 2.0t engine. The turbo also sees hotter temps than normal due to performance modifications. The oil capacity is approximately 5 quarts (w/ filter). The vehicle is also driven 80-90% city & the rest is high speed, high RPM driving. All aggressive driving is done only after the oil has completely warmed up to temperature and cool-down driving is done before shutting off the engine.
I am currently running GC + appropiate dosages of LC & FP in the fuel tank. However, I am running out of LC and am considering dropping it completely in favor of a shorter OCI.
Given those conditions, would it be advantageous to cut my OCI in half and run the GC for only 2500mi? Right now I'm about 3000 miles into my OCI and am considering sampling it and doing a UOA.
Dave
Perhaps this isn't important when the engine is running, but I'm a bit concerned when the engine is shut off after normal or hard driving.
The engine does have an afterrun coolant pump which reverses coolant flow through the turbo after shut-off and pumps coolant from the radiator into the turbo in order to help prevent coking & deposits from forming on the shaft.
The car in question is a 2006 Audi A3 with the 2.0t engine. The turbo also sees hotter temps than normal due to performance modifications. The oil capacity is approximately 5 quarts (w/ filter). The vehicle is also driven 80-90% city & the rest is high speed, high RPM driving. All aggressive driving is done only after the oil has completely warmed up to temperature and cool-down driving is done before shutting off the engine.
I am currently running GC + appropiate dosages of LC & FP in the fuel tank. However, I am running out of LC and am considering dropping it completely in favor of a shorter OCI.
Given those conditions, would it be advantageous to cut my OCI in half and run the GC for only 2500mi? Right now I'm about 3000 miles into my OCI and am considering sampling it and doing a UOA.
Dave