1987 Integra - 154k - currently does 2.5k/yr - use Valvoline High mileage oil
1999 Integra - 85k - about 5-7.5k/yr - use Synthetic oil
Both are being used mostly in towns in San Fran bay area - some limited freeway drives
I change engine oil at a shop. Tranny fluid, I do it myself.
As such I change oil on the 87 once a yr - I noticed that soon after the oil change (87), the vibrations etc are dampened!
If this is true, it raises the question, should I change oil more frequently?
After changing the oil on 99 Integra, I feel that it is less sluggish, & more responsive - when I press the gas, it responds. It’s been convenient to change every 5k since that is also the time I have to rotate the tires.
If I were to make change in this oil change practice, what should it be? Every 4k on 99? Every 8 months on 87? Or use a different oil?
Appreciate your advice.