Originally Posted By: Bill in Utah
Originally Posted By: LeakySeals
Originally Posted By: Bill in Utah
Originally Posted By: LeakySeals
Any engine with variable valve timing (vvt, vtech, etc) should run synthetics. Any buildup of sludge or varnish causes problems with them sooner or later. Run dino ok, but keep it short.
Oh no! My 226k mile Corolla is in trouble then. 7-9k ocis through its life.
Running fine. Just like most others that run conventional oil.
Bill
Good for you and all your followers. Whats great about BITOG is countering opinions. You have mine.
You MADE a statement as FACT.
Originally Posted By: LeakySeals
Any engine with variable valve timing (vvt, vtech, etc) should run synthetics. Any buildup of sludge or varnish causes problems with them sooner or later. Run dino ok, but keep it short.
That statement is NOT true. My engine has VVT (or whatever they call it) runs conventional oil with NON "short" OCI and does not have a problem yet. Since "sooner" has gone when will "later" be?
You are correct that is your opinion. But remember that more people read this forum and take back what they read to other places and we just need to keep opinions as opinion and facts as facts.
You are running a syn oil 5k OCI? If its so great why not longer? The factory stated OCI for your model is 7,500 mile OCI with (I think) API SJ conventional. You are running Mobil 1 High Mileage oil 5,000 miles.
Don't have any trust in the oil?
Taking the recommended oil from 7,500 miles to 5,000 miles would be what some people consider a safety margin. But then taking a "better" oil that "should" do 7,500 miles easy shorter is for what reason?
Just trying to see the mindset.
Bill
Makes sense. I can see how short responses can be misinterpreted. Was an opinion based on experiences researching and dealing with with variable valve timing problems. Keeping it short the mindset was...most people on here are into maintenance. But not all people maintain vehicles as they should. Infrequent oil changes, lack of maintenance, etc. For some cars you can get away with it. Others you can't. A simple google will provide page after page of vvt related issues. Researching them for my own problem the common theme for more than half is poor maintenance. Having torn one apart a vvt system it is vulnerable to problems related to sludge and varnish buildup at the OCV, its oil gallies and the vvt actuator.
You are having no problems because you are a good maintainer. Others are not. Not knowing how people maintain the general suggestion would be synthetic as not to have this issue. I did say dino ok keep it short i did not say don't use it. Thats really all there was to it.
As far as analyzing my sig, the corolla is recovering from VVT-i issues including a P1349 (clogged OCV and screen) and a sticky actuator which I was able to clean and would never attempt again. It also had a problem where the small piston oil hole returns clog causing oil consumption. Removing the pistons and drilling out hardened carbon is something I never want to do again. the Camry is under severe service. Had many sludge related problems that have subsided including oil consumption and ticking which I now suspect could have been the early stages of the corolla's vvt issues. All related to poor maintenance from prior owners including admissions to stretching out dino. When I'm comfortable I will extend the corolla.
Hope this helps explain why I wrote that and the mindset.