I typically do two clicks of the OLM for my PSD. That's about 15,000. Oil is synthetic 5W40. I am an Amsoil bypass oil filter. And typically do a UOA.
Group I conventional oil can turn to sludge/varnish at 3k miles due to it's inability to handle higher engine temperatures.I do 3k OCIs. Been doing 3k religiously since 1970..
Glad to hear that you've had some good results with longer oil change intervals.I don't like wasting money on anything but since this is an oil site and an oil discussion I will keep my comments related to that. I just wonder how anyone who is a long term member of this site can still do 3k oil changes? I did 3k oil changes before I found this site, but since then I have realized how much time and money I was wasting. And I haven't had a single issue with any of my engines, even though my OCIs have been between 6k to 10k on all of my vehicles for 22 years now. There are very few situations that would call for a 3k OCI these days. Even if I was being ultra conservative I'd never do it sooner than 5 or 6k. My UOAs over the years have proven that I haven't been pushing my oil too far at all.
They can give you a good idea though, if you don’t push the oxidation levels too high for instance. And the fact that my engines never saw any degradation in fuel economy points to them not being sludged up. It’s not as if I was using poor quality oils and running 25,000 mile intervals. I have always used good quality synthetic oils that could easily achieve the intervals I was running. It’s not like my 6-10k intervals were all that extended anyway. Definitely not intervals where sludge would be a concern.Glad to hear that you've had some good results with longer oil change intervals.
One thing to keep in mind is: UOA's don't measure sludge/varnish accumulation caused by extended oil changes.
I been running 5w30 Supertech regular full synthetic in our 2016 Fusion 2.0 ecoboost for most of it's life usually 6 month intervals (4,000 to 5,000 miles) car has 80,000 miles. I think it's a good oil for my intervals. I'm sure I go longer, but I get bored.Would anyone be doing 10k OCI with SuperTech Full Synthetic oil for years.
Was just wondering if it can handle 10k OCI without issue.
Also is anyone using SuperTech Full Synthetic in Ford Ecoboost engines (which are known for being hard on the oil)
and what OCI are you doing?
Thanks for that info. It would be interesting to find someone whose done 10K mile OCI with SuperTech Full Synthetic 5W-30 in their Ford Ecoboost engine since new, and get their feedback as well.I been running 5w30 Supertech regular full synthetic in our 2016 Fusion 2.0 ecoboost for most of it's life usually 6 month intervals (4,000 to 5,000 miles) car has 80,000 miles. I think it's a good oil for my intervals. I'm sure I go longer, but I get bored.