OCI for 94' Mercury Sable 3.0

[John With Beastly 302]

6K miles so far on this current OCI and I'm running Napa Premium 10w-30 dino and a Napa Gold filter. I've added 3 qt's so far and just curious if by adding a quart every 2K miles makes it easier for extended OCI's.

 

[simple_gifts]

There was a thread on here a few years ago, a guy running 18K OCI on a Geo Prizm because of the amount of oil he was adding. I can't recall exactly, but the UOA didn't look that bad...

 

[PZR2874]

I'm going to go out on a limb and say no. If it was 1 qt every K, maybe. If it was Syn, yes.

 

[John With Beastly 302]

I don't think I've ever gone this far but with the available time to service I've put it off. I was wanting to do a UOA but because the cost is more than a oil change well. I usually go every 3-4K.

 

[Rand]

yes fresh additives.

 

[95busa]

at the same time no because the insoluobles are still building up and the filter is loading up also. My pet theory is "no" because I am guessing contaminants dont all burn or leak out, so the ration between oil added and contaminants probably is not linear.

 

[rshaw125]

Burning the oil? leaking the oil? PCV valve been replaced? Oil rings dirty?

 

[toneydoc]

Sooner or later the filter will probably clog up and the bypass valve open and then you can run the beast with unfiltered oil and never, ever know it. That would not make me feel too good to do that.

 

[dave1251]

I think you would be able to go 12K if you change the filter. Nothing scientific this is just a guess.

 

[Maxima97]

Any cheap filter and name brand motor oil will do better at 5K OCI than extended OCI with expensive synthetic and filter. Only at extreme cold temp and racing condition make sense to using expensive things.

 

[beast3300]

How many miles do you put on in 6 months? That would likely be the OCI, 6 months.

 

[John With Beastly 302]

Well if it's during a semester I put on around 1,040 miles a month for about 5 months. I'm changing it this weekend running Castrol GTX 10w-30 and a Mobil 1 M1-209 filter.

 

[GMorg]

I've shared this before here, but we had an old farm truck that leaked oil fast enough that we never changed the oil, for years. I don't recall the oil begin changed at all during the '80s.

 

[John With Beastly 302]

Originally Posted By: 95busa

at the same time no because the insoluobles are still building up and the filter is loading up also. My pet theory is "no" because I am guessing contaminants dont all burn or leak out, so the ration between oil added and contaminants probably is not linear.

What are the insoluobles?