Fascinating about the Tahoe. I have a Yukon also and put about 4K miles a year on it. I change the oil yearly. (w/ Syntec) Just curious. How did you get the oil analyzed?/ I always wonder if they are giving me the Synthetic when I pay for it? my guys a small guy and has a few mechanics. He is not always there. I watch as much as possible but sometimes they put it in the last bay.cruiser68 said:I generally make the first change early at around 1000 or 1500 just to get some of the break-in metal out. After that, I use synthetic and change according to the DIC.
Also your Enclave is guessing on the condition of the oil, not actually testing it. It guesses based upon many factors but it is still a guess. I had oil analysis done on my Tahoe and it reported that in that vehicle the oil was breaking down before the DIC said to change it. According to testing, my Tahoe got changed at 5000miles.
I used these guys http://www.blackstone-labs.com/ for testing. I think it was $17 per test. I change my own oil so I could run Mobil 1 AND include the test fee and it was still cheaper than having it changed with synth at a quick lube place. I knew I was going to keep the Tahoe for a long time so I started testing at about 5000 miles and tested every oil change. They send you test kits which is a plastic container and a mailing kit. Just send a sample and a week later they send a report and recommendation on oil changes. Tells you if your air filter is working (high silicate levels if not),tells you if your oil filter is still filtering (high insolubles if not), and gives you good warning to a potential failure (you would see higher levels of certain metals for certain types of failures (high bearing wear, cylinder scraping, etc), tells you if there is any antifreeze in the oil, etc.Smokin SRX said:Fascinating about the Tahoe. I have a Yukon also and put about 4K miles a year on it. I change the oil yearly. (w/ Syntec) Just curious. How did you get the oil analyzed?/ I always wonder if they are giving me the Synthetic when I pay for it? my guys a small guy and has a few mechanics. He is not always there. I watch as much as possible but sometimes they put it in the last bay.
Also, what did they charge?? you'd think someone would make an OTC kit as they do with Pregnancy testers!! Just don't get them mixed up or YOU may get greased!! ;D
Actually, when you return after a long trip, the oil will probably be in better shape than it was before the trip. The oil will be at full temperature for an extended period which will burn-off all of the contaminants. Oil is good for a pretty long amount of miles as long as you let it get fully heater every once in a while. It's the short trips that kill the oil because the car runs rich at start-up which makes unburned gasoline and water build-up in the oil. Burn that stuff off and the oil is good as new. Of course, over time, the oil will break-down and not lubricate as well but again, I wouldn't bother changing it as soon as you get back because it won't be necessary.lisa said:Thanks everyone! We leave tomorrow am...and things have been so crazy that I missed the 3K mark....I hope that everything will hold up, and I will get it changed as soon as i return (unless they can squeeze me in today :thumb i will call now.
Really appreciate your responses!
MERRY CHRISTMAS, HAPPY BELATED HANUKAH AND A HAPPY NEW YEAR!
The 3,000 mile oil change was for the old days when non-synthetic oil needed additives to be multi-viscosity. These additives would be used up rather quickly and usually made the oil less effective. Later when the oil became better with better additives, conservative companies like Volvo went to 5,000 miles.Rosita2001 said:I am REALLY confused now...I thought we were to change oil every 3000 miles. Now the dealer tells me, "your car will let you know when it needs changing.".....HUH?! First oil change at 1000??? 3000???? When I get an email from "Shapphire"?? Help! (have 3000+ right now!!) [/color] :help:
GM is getting close to this with its 6094M spec for 5W30. If you look at the oils available in that category, most are full synthetics or semi-synthetic.jacko said:Tin Man... You mention synthetic oil being required in most modern engines. I know the Enclave's engine is technologically up to date, but see nowhere in it's literature that synthetic oil is required. Am I missing something?