Just acquired a 2.0T Honda Accord with only 20k miles on it. I drained the oil as received to run a change of VRP 5w30 to clean out any deposit nucleation that might have started already. This initial ODI gives me some time to ponder long term strategy.
I'm thinking about long term going to a 5w40 oil. Here's why:
1) The newer GDI Hondas are known to struggle with fuel dilution in certain duty cycles (i.e. normal driving instead of hot rodding). Data highlighted by Lake Speed Jr suggests running fuel dilution in the ring pack can be DOUBLE of what the value in the oil analysis (pan sample) shows.
2) CAFE is pushing oil pump capacity to the minimum and also oil pressure to the minimum (parasitic drag reduction equals MPG). This lowers oil pressure especially at lower engine RPM where those same CAFE rules encourage carmakers to operate their engines for best MPG. (taller gearing on highway cruising)
3) Oil ring tension is also reduced to the minimum on newer engines, increasing consumption with thin oil
Where I live, a 5w oil is thin enough for all winter conditions. The extra five degrees of a 0w is not needed as I have essentially instant oil pressure even in rare single digit cold starts.
Now, most of the 5w40 oils are "euro" oils I'm sure chock full of cheap VIIs that will shear down to 5w30 anyway. SO I'm thinking HPL oil in 5w-40 in the Supercar line to get the ultimate in antiwear, antioxidation, and shear stability.
I want to keep this engine as clean and low-wear as possible.
I'm thinking about long term going to a 5w40 oil. Here's why:
1) The newer GDI Hondas are known to struggle with fuel dilution in certain duty cycles (i.e. normal driving instead of hot rodding). Data highlighted by Lake Speed Jr suggests running fuel dilution in the ring pack can be DOUBLE of what the value in the oil analysis (pan sample) shows.
2) CAFE is pushing oil pump capacity to the minimum and also oil pressure to the minimum (parasitic drag reduction equals MPG). This lowers oil pressure especially at lower engine RPM where those same CAFE rules encourage carmakers to operate their engines for best MPG. (taller gearing on highway cruising)
3) Oil ring tension is also reduced to the minimum on newer engines, increasing consumption with thin oil
Where I live, a 5w oil is thin enough for all winter conditions. The extra five degrees of a 0w is not needed as I have essentially instant oil pressure even in rare single digit cold starts.
Now, most of the 5w40 oils are "euro" oils I'm sure chock full of cheap VIIs that will shear down to 5w30 anyway. SO I'm thinking HPL oil in 5w-40 in the Supercar line to get the ultimate in antiwear, antioxidation, and shear stability.
I want to keep this engine as clean and low-wear as possible.