Ricklee4570

There have been numerous studies out by independent agencies that test oils and all pretty much agree with Consumer Reports and the taxi cab study. Engines that went 30,000 and even 60,000 miles without an oil change showed no appreciable wear differences than those changed every 3,000 miles (and they used micrometers and calipers to measure all wearable points in the engines.)

My wife has a 2012 Honda Civic with 180,000 miles. Owned it since new. Change the oil every 14,000 miles and it runs perfect. She sold her Honda Accord after she put 200,000 miles on it. Changed the oil every 15,000 miles. Her daughter drives it now, it currently is knocking on 300,000 miles and she goes up to 20,000 between oil changes. Engine is perfect.

Personally I go by the vehicles computer. For my 2015 Ford Focus it is about 7,500 miles. I use standard Motorcraft.

If it makes you feel good to change the oil, go for it. I have three new Fords all with the Lifetime Warranty and my dealer recommends 7,500 between oil changes or "whatever the computer tells you".

BadFish523

LOL Come on now! This is an 04-08 forum. We don't have fancy computers to tell us what the oil life is.... Also these engines have notorious oil pressure problems. I said before any vehicle other than this truck I see no reason that an annual change with an acceptable oil would be a problem.

rking620

I religiously changed the oil in my 2005 Explorer every 3k-5k miles, even when I was a broke college kid. In 2013, I acquired a 2004 BMW M3 and after scouring the forums and the owners manual and talking to the dealership, I learned that the oil only needed to be changed at the service interval (~12k miles). That took some getting used to. Now both my Challenger and F-150 get oil changes when the light comes on. My Challenger is at my parents' house right now, and my dad refuses to listen when I say "change the oil when the light comes on" and he changes it every 3k-5k miles or 3 months. Whatever, its his $$$...

650NutKase

I love doing extended OCI's when the vehicle allows me to. The issue for me is that me majority of us with the 11th gen trucks don't go past the 5k interval. The timing components tend to not like extended intervals. So, in my book, this oil serves no purpose for me.

FrozenTundraGuy

There are a few stations around me that sell Premium gas with no ethanol at all. I'll think I'll use that in my new Honda mower I'm getting

hahanson

One thing to consider in tests like this is that there are rarely any "cold starts", which is responsible for the majority of engine wear. They also don't suffer the same abuse caused by excessive sludge buildup nor suffer from chemical changes of the oil due to constant temperature changes as they typically run 24/7 and continually run at optimum engine temperature.

Do you have or know of anything other than anecdotal evidence to support this?

The reason I ask is that much of the information I've read on VCT issues relate to things other than OCI of synthetic oil, such as broken locking pins, a tendency to leak oil out of the center of the oil pump which leads to reduced flow, broken roll pins, and VCT solenoid failure.

650NutKase

I have no empirical evidence on hand at the moment. However, the principle of varnish creation is the reason that the VCT's tend to fail. Extended OCI's are known to increase the risk of varnish build up. Thus, reducing the OCI to 5k with a quality oil, reduces that risk significantly.

rking620

Forgot which forum I was in oops!




Same here, but my lawn equipment runs like **** on premium gas.