Is it true on an '01 C-5 Vette using Mobil 1, that it is only necessary to do an oil change every 15,000 miles

I own a 2001 C-5 corvette and I am under the impression that because I am using Mobil ONE synthetic oil, that it is FACTORY RECOMMENDED that an oil change only needs to be done every 15,000 miles or so, or when the on dash computer says "oil life" is around 40 % . Any of you motor heads know "THE REAL TRUTH" about this ???

Is it true on an '01 C-5 Vette using Mobil 1, that it is only necessary to do an oil change every 15,000 miles
here's the truth. Yes synthetic oil is a much better oil and corvette requires it because of temperature. A vette sits very low to the ground and therefore doesn't get much air flow to cool the engine. As far as the interval anything more than the owners manual recommends is to much. Most manuals will suggest 3000k miles to 7500 miles regardless of what type of oil you are using. The myth about synthetic oil is terribly wrong. It still has the same additive packages as conventional oils. Do you know that those additives are designed to do? They trap dirt like little sponges. Once each additive is full it cant take on any more dirt and the dirt moves on to the next additive. Well synthetic or not your engine still takes in the same amount of dirt in the intake so no matter what oil you use it still wears out the additives just as quick. the oil itself never breaks down synthetic nor conventional it just gets dirty and the additives get used up. so do yourself a big favor and go by the owners manual and not this crazy 15000 mile thing. That is a awesome car and is not a cheap one either so make sure you put some money into maintenance to keep t nice.
Reply:ya but its realy not good for the pressure under the pistons and can over heat the block and crack the heads
Reply:It is true, but if you beat on your car a lot you should probably change it at about 60%. The cleaner your oil is the happier your car is. :)
Reply:Yes. Truly synthetic oil only needs to be changed around 15,000 miles. I still replace the filter with an additional quart of oil at least every 6 months, depending on how spirited she's driven. You can't go wrong with the 'smell' test. If the oil is black and smells like unburnt gasoline, it's time for a change no matter how many miles.





The key is 'truly' synthetic. There are many quasi synthetics out there, which is only a percantage synthetic. Usually around 33 or 50 percent.





And yes, a Corvette motor was built with a little more care than the other small blocks. ie, tighter tolerances.
Reply:no that's long time,,i own a repair shop in Tennessee and you can go as far as 8 thousand on a good oil change with synthetic oil,but who ever said 15 was a little wrong on this one,i use it in all my cars including my hemi challenger and i change it around 8 thousand in all my vehicles,good luck i hope this help,s.
Reply:That seems a bit long to me. There's nothing magical about a Corvette engine or Mobil synthetic oil. I'd change it at least every 5,000 miles.
Reply:dont go more then 8,000 miles.synthetic oil is good but it can only do so much. You should however change the filter after about 3500 because it is not made to go that long.
Reply:I am mechanic and for me the mobil one is the best oil ,,,the 15000 is the limit in the oil i recommed changed every 8000 ,,,because always is better change the fluids before the limit ,,,,that`s my opinion,,,bye.
Reply:there is no way in hell i would wait 15000 miles before i changed my oil in any car no matter what it says especially in a high output engine your gambeling if you do even 5000 seems like alot i know these new oils are supposed to be better but the fact is that there are still some impuritite in the oil that can scar or damage things like cylinder walls rings guides