Originally Posted By: Clevy
For 5000 mile intervals or less I don't suggest a synthetic at all. If you want to use M1 its capable of double that interval and I not suggest any castrol except German castrol 0w-30,at the same 10000 mile interval.
For 5000 miles or less grab whatever conventional is on sale. Pennzoil yellow bottle,Mobil super,valvoline white bottle etc. All are more than capable of 5000 mile drains.
Well i like to use synthetic because of all the short trips i do, and doesnt synthetic cling to parts better? and flows better and quicker when you start your car....my car wears more because of all the short trips i do, most people drive to work and drive more than 3.5 miles like i do then drive back, i do at least 5 starts a day, most of those the car has cooled off. and starting your car does the most wear. so ill use synthetic, and i change it "early" because the car doesnt always get up to operating temp so there will be fuel and condensation in the oil that doesnt burn off, so i like to get all that flushed out