That's one area that a lot of members here fail to mention when they try to talk people into going with conventional oil or going with synthetic at 10-15k intervals, but that's resale price (and ease of sale too). You won't get a lot of people knocking down your door if you put in the ad that you've been doing 10-15k intervals (with any type of oil) but if you mention that the engine has had a steady diet of synthetic every 3-5k you'll certainly get a lot more responses to your ad, and will most likely get a better price too (as proven here) So you just made up that extra money you spent right there (plus made the resale process much easier too)
Originally Posted by IndyFan
I had a 99 Silverado that I purchased new. It had the standard silver bottle Mobil 1 5w30 in it from 1500 miles until I sold it at 130k or so, every 3k to 5k miles. (When I first bought it I was still on a 3k mindset with 5k being an extended run. I'd say around about 60k or so I started regularly going 5k). Anyway, I sold it to my secretary's husband. He still has it and continued the M1 5w30 routine. The truck has over 300k on it now and the engine runs strong. The rocker panels are rusted out, though, Lol! He paid my initial asking price because he knew my maintenance routine and that I am a bit of a nerd about that stuff. He didn't even try to negotiate. It was a fair price, though, but I still set it with the expectation of some negotiation. I'd say we both got a great deal out of it, looking back on it.