I have a Honda Ridgeline, I drive mostly freeway. I use Valvoline conventional oil and I want some opinions on the maint. minder and the length of the oci it uses. Under my driving conditions it usually goes about 7100 miles for an oci. I have read that the maint. minder is calibrated to use conventional oil but is 7000+ miles too much for a conventional oil? I quized the local Honda dealer and they recommended not to follow the maint. minder and not to go more than 5000 miles even using their house oil which is a synthetic blend. I've had the truck for a while and havent had any problems but now that it has a 100,000 miles I dont want any sludging problems in the future as I plan on keeping it untill its ready for the scrap yard.