One of the smartest replies I have ever seen on this forum....lol The 3k oil change is the oldest scam in the books......I change my oil in all but my diesel every 10k and have managed to get 400K out of my oldest truck thus far.........You could get 15K easily using modern synthetics.....

 

Common sense tells us there is no sensor nor does the computer know what kind of oil is in it. If it did, you wouldn't need to reset the oil check timer.

Good read though.

 

While I don't believe in 3k oil changes, No way I would wait til 15k. Opened many an engine in my time turning wrenches.
I change mine 5-7k. I don't wait for a computer to tell me to as long as it is not sub zero out. The computer just uses parameters based on the driving conditions, It doesn't give a crap whether you have synthetic or plain old dino. Unless you start off new with synth there is not really much of a benefit in dumping it in after 60k. If GM thought they would get another 50k miles out of your engine by just changing from dino to synth they would have come that way.

I have had many an old farm bucket we trashed on that we didn't care what kind or even weight we put in as long as it was full, they all went over 200k.

 

One of the smartest replies I have ever seen on this forum

 

Honestly, I don't think you can compare old farm trucks to today's engines with tighter tolerances. I do think it's really important to have the right weight for new vehicles. As far as synthetic vs. dino, the debate will go on and on.. Personally, I think synthetic WILL hold up better and last longer, but it still gets dirty. I've always changed my oil somewhere between 3k and 5k miles, dino just just fine for that. I may switch to synthetic or a blend now that I have decided to go by the oil change light. I'll still be checking it from time to time and if it starts running low or starts looking really dirty I'll change it.

The nifty computer doesn't know if I'm driving around town or down a dusty trail, actually checking the oil matters.

 

Other than the fact that 30 years on the old ford and it still runs like a champ no matter what you throw in on or under it. Don't get me wrong I love the 3, But I highly doubt it will get anywhere even close to 30 years of service even if I jump on the placebo bandwagon and put synthetic in it.
I'm pretty sure if they thought they could get away with the 'Your Hummer takes a super special synthetic oil that is why your oil change is 249.99' line they would do it.

 

i put a lotta oil in a lotta fords, the best i got in a 74 302 van was 143,000, and it got good oil every 3000, and some stp. bearings, maybe just one!

i do think the 460 would go forever,,,had one in an 80 mustang,,fun ride