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#8916 of 8944 Re: Low Mileage [sandman_6472]
Jan 14, 2011 (9:55 am)
Let me be the first to say this is an apples to oranges comparison and might be totally off topic.
I just recently took a 94 TLC (I-6) with 187,000 miles on the clock (needing an oil change app 20,000 miles OCI (yes I did change it app 22,000 miles) to a CA state smog only station" for its smog test. The last major "tune up" is inxs of 30,000 miles ago. The vehicle is 17 years old. Essentially the MEASURED/detected mitigated emissions were all ZERO's !!!!!!! Needless to say.... all PASS !!!!! Good for another 2 years when it will again face the smog nazi's who will probably want dearly to EXECUTE this vehicle.
More on topic, the 7 or so quarts (Mobil One 5w30 )and FRAM PH8A oil filter (13 years old) were changed. If anybody wants a sample for a UOA, let me know I can arrange to keep the next sample for you. Indeed just send me the kit and I will send the sample to a lab of one's choice.
#8917 of 8944 Re: ignore time based OCI? [xwesx]
Jan 14, 2011 (11:55 am)
So TBN may potentially decline to a questionable level based just on time?
I had always thought the time based OCI was based on an assumption that if you did not hit the mileage figure, you were probably doing a lot of short trips.
#8918 of 8944 Re: ignore time based OCI? [jeffyscott]
Jan 14, 2011 (12:09 pm)
TBN can decline, that said, all oils that are certified to meet the VW 502.00 oil specification are good for at least a couple of years without a measurable decline in TBN.
#8919 of 8944 Re: Low Mileage [rdub7]
Jan 14, 2011 (12:12 pm)
5W20 is the recommended oil & at this point, I'll be lucky to see 2k miles this year alone, so figured the once/year dino swap should cover all the bases...synthetic might be overkill as I'd never go past the 12 month change interval no matter what...so I'd be wasting $ actually I guess. Right now have 50% on the oil minder so I've a bit to go till I hit 15%.
#8920 of 8944 Re: ignore time based OCI? [shipo]
Jan 14, 2011 (12:26 pm)
I found some more information, in Europe VW offers what they call "long life service regime". This would be with oil monitoring, but does allow up to a maximum of 2 years. However this requires a long life oil and their guidance also says:
To obtain the most benefit from the LongLife service regime, the car should to be generally driven in a style/condition of use listed below:
• Mainly longer distance journeys
• Limited number of cold starts, engine is kept at operating temperature over a longer period of time.
• Daily mileage above approx. 25 miles.
• Constant speed.
• Vehicle used regularly.
Our usage does not really seem to fit what they suggest there...so for us, without going to the trouble of doing oil analysis, it would probably best to just stick with 12 months.
#8921 of 8944 Re: Low Mileage [sandman_6472]
Jan 14, 2011 (1:16 pm)
5w20 has been proven to be a VERY robust specification. This has been proven both over many years, miles and UOA's. I think that almost all vendors (blenders, refiners, etc) offer a 5w20 product. If you want to carry it to the TMI level, a UOA competition will show pathways. 5w20 really has BEEN, to becoming the new (ubiquituous) "5w30", as it took over from 10w30, which took over from 10w40. I even hear tell Toyota has respecified 5w20 (to 0w20- for products specifying 5w20 you CAN use 0w20) for some to most of its' offerings.
Now there has been comparisons between different viscosities as to which viscosity yields BETTER wear metals (aka LOWER). But for a general audience, this discussion can be labeled; arcane.
#8922 of 8944 Re: ignore time based OCI? [jeffyscott]
Jan 14, 2011 (2:34 pm)
Right and you also have to remember that autbahn travel can dictate much higher speeds and in effect much more "demanding" conditions for the same specifications' oils.
On the other hand, even people who follow and do UOA's really have a hard time believing (at times) the stuff written in black and white (color too in this day and age) laying right in front of them.
#8923 of 8944 Re: Low Mileage [rdub7]
Jan 14, 2011 (2:59 pm)
Actually there is a reason for the offer in the last paragraph of this post #8916. First off, NONE of the doubters have (EVER) taken me up on this. Most I think are afraid their fears will be proven wrong. I also think it would literally GAUL them to submit the (my) sample to a lab of their choice and have to say in print they were.... WRONG. Another reason might be that the results of the sample will not be sent to me. It would be hard for me to lie about a document and sample that I didn't have control of????? In effect, they can really say what they want about a document that I do not have and that THEY have paid for.
#8924 of 8944 Re: burning oil [tamu2002]
Apr 04, 2011 (9:37 am)
For those who're still interested, here's an update on my Honda Accord presumably burning oil. I monitored the level until its recent oil change and saw no dropping in the oil level. I don't know why I saw what I saw initially, but am just happy that my Accord does NOT appear to burn ANY oil
I use Castrol 5W-20, OEM oil filter. OCI is ~7K miles, 7 months.
#8925 of 8944 Re: burning oil [tamu2002]
Apr 05, 2011 (4:59 pm)
Honda recommends 10,000 miles OCI's (conventional oil) for the 04 Civic. What does Honda recommend for yours? 7,000 miles seems way too early to consume even a little bit, which is normal. Mine uses 1/4 to 1/2 qt (8 to 16 oz.) of oil in a 20,000 miles OCI. The consumption does not SEEM to start until 15,000 miles.