I guess I don't see why 6,000 or 7,000 miles is a big deal on current conventional oils with engines that are easy on oil, especially if it's mostly highway mileage. I change my oil twice a year-spring and fall. I just changed the Elantra yesterday with 6,955 miles on a fill of Castrol GTX 5W-20 and my wife's Subaru Outback with 7,126 on the oil (Castrol GTX 5W-30). I've been doing this for the last decade without a single oil related issue, and both cars currently have over 100,000 miles on them.
I usually buy a name brand that's on sale when I change it, and this time I purchased Pennzoil a couple weeks ago when it was on sale.
Originally Posted By: gulian
anything past 9,000 km. is not going to happen in my vehicles syn or dino
That's only about 5,600 miles. What a waste of money, especially if you're blowing your money on an overpriced synthetic.