Tldr: The title lol.
I have a 99 Chevy s10 2.2, and it has been running synthetic blend oils (5w-30). It is at 112k miles. And since I am doing my own oil changes, I noticed that blends and full are damn near the same price.
I have been doing 5k intervals with blend, should I go to a 7.5k interval with a full? My truck has a highway maintance schedule in the manual that says it could do 7.5k going by highway miles. I drive mostly highway (speed limit near me goes to 45 at the lowest).
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Longer interval with full synthetic is fine on a gasoline engine.
Typically I would do an oil sample with the longer interval to make sure you actuslly have the oil life to go that long with your specific driving conditions.
I might look into that
You can absolutely do longer intervals with full synthetic over blends. I’m pretty certain synthetic blends only need to be 5% synthetic to market themselves as blends
Are you doing 5k kms per oil change or miles? I would make the switch and do longer intervals, be sure to keep an eye on your oil level if you do indeed go for longer intervals
Miles
You could, but why? You have an almost 25 year old truck. The 5k intervals have halped it last this long. How much can you really be saving by going 50% longer?
Well putting in a nicer oil I would assume id get more performance out of it. Im doing 90% highway 10% city and the manual says 7500 mile intervals doing highway is just fine. And it was designed when oils were worse than they are now. And its only got 112k miles.
Absolutely. I’ve done 10k mile intervals with several naturally aspirated cars for years. Full synthetic and ext-interval filters. No engine problems.
What does the owner’s manual say for an interval?
As I said in the post, 7500 highway 3500 city. I do 90% highway.
I am one of those people that changes synthetic oil and filter every 10,000 miles. All of my vehicles have gone at least 15 years and 165,000 miles with extended drain intervals. Old habits like to 3,000 and 5,000 mile changes are hard to break. That said, many here will say oil is cheap. True. My time is a factor as well. You know better than anyone else how the car is driven.