I tend to change my oil at 4000 miles interval (although honda recommends 8000) because of the low mileage I do.
I have alsway used a real full synthetic in my engines (not synth blend, technology...) and 10/50 grade (although honda recommends 10/30!).
So after my favorite brand & viscocity was discotinued, I switched to silkolene pro4+. I could not notice any difference to gearchange, nor fuel consumption until a year and 2000 miles later when I noticed the oil pressure light would stay on a split of a second longer on first cold start of the day.
At the last change I decided to change grade to 10/40 and switch to motule 300V. Here are my initial observation after 500 miles:
no change in fuel consumption
the oil pressure light now goes off almost immediately (even at close to freezing temperatures)
the engine cooling is not as good as 10/50: running temperature is the same but the thinner oil is very quick to heat up when moving slowly or stationary
So I don't think the engine cooling is as good as 10/50 and I'll switch back to this grade at the next oil change although not to pro4+
I have alsway used a real full synthetic in my engines (not synth blend, technology...) and 10/50 grade (although honda recommends 10/30!).
So after my favorite brand & viscocity was discotinued, I switched to silkolene pro4+. I could not notice any difference to gearchange, nor fuel consumption until a year and 2000 miles later when I noticed the oil pressure light would stay on a split of a second longer on first cold start of the day.
At the last change I decided to change grade to 10/40 and switch to motule 300V. Here are my initial observation after 500 miles:
no change in fuel consumption
the oil pressure light now goes off almost immediately (even at close to freezing temperatures)
the engine cooling is not as good as 10/50: running temperature is the same but the thinner oil is very quick to heat up when moving slowly or stationary
So I don't think the engine cooling is as good as 10/50 and I'll switch back to this grade at the next oil change although not to pro4+