Last post on Jun 21, 2011 at 9:46 AM
You are in the Cadillac DeVille
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Cadillac DeVille, Auto Repair, Oil, Sedan
#17 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bremertong]
Jun 04, 2006 (11:28 pm)
A lot of people, some of them with professional knowledge of Cadillacs, say to follow the oil life indicator. Wait until it gets down to 10%, and then change.
For most of my life I've changed oil, and filter, at 4,000 miles (or every year if I'm driving it less than 4,000/year). I've felt this is a very conservation schedule compared to the 6,000 or 7,500 or even now 10,000 mile schedules recommended by automobile owner manuals.
And not near the 2,500 or 3,000 miles the dealership service people recommend, which is mainly to move money from your pocket to theirs.
#18 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bolivar]
Jun 05, 2006 (3:35 am)
I also look at my oil color. I drop a couple drops onto a paper towel and look at how the spot spreads through the fibers. When the darker center is dime size, I start getting ready to change oil.
#19 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [imidazol97]
Jun 05, 2006 (5:23 pm)
I don't put much weight in color.
I've used oils that will darken up significantly within one week after a change.
But I've been running Castrol 5-20 for a couple of years, and that stuff looks almost like water when it goes in, and it darkens up very little, even over a couple thousand miles. By 4,000, it will be somewhat darker, but this stuff has less color change that any oil I've previously used.
#20 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bolivar]
Jun 05, 2006 (9:53 pm)
I have also tended to change at four months and 4000 miles
but having only driven 3000 miles in the last four months and indicator at 75% think I will wait til five months. Will probably have only driven 4000 miles by that time.
#21 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [imidazol97]
Jun 05, 2006 (9:55 pm)
Thanks! will experiment with the paper towel and see what happens.
#22 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bremertong]
Jun 06, 2006 (4:53 am)
Bolivar has a point about the color being a subjective measure. I know what the oil looks like at 500 and 1000 miles and then as it changes from this brand's and this motor's characteristic color and starts looking denser and carrying more oxidation and contaminants I judge when to change. I have no problem with running up higher on my 03 leSabre with a digital oil life gauge. In winter I change quicker and if the car's in hot traffic where the car is running hotter due to low air speed under the oil pan and around the motor I change quick, i.e., after summer vacation on expressway snarls around chicago or Philadelphia.
#23 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bremertong]
Jun 06, 2006 (4:53 pm)
I agree that on Cadillacs with an oil life indicator, you should go by the indicator. When you have a sophisticated measure of when the oil needs to be changed, why guess?
#24 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [bwnunnally]
Jun 06, 2006 (5:54 pm)
>When you have a sophisticated measure of when the oil needs
Oils vary, as Bremertong mentioned, and those systems don't adjust for various oils. One example is if you use synthetic there's no adjustment.
#25 of 103 Re: 2004 DEVILLE OIL CHANGE FREQUENCY QUESTION [imidazol97]
Jun 06, 2006 (7:26 pm)
I just change mine every 4000 miles or 4 months at
the Mr. Goodwrench or Monroe tire center for less
that $20 bucks (with a lube job) then reset the
worthless oil monitor gadget and drive happy!
#26 of 103 SOME FURTHER THOUGHTS ABOUT OIL CHANGES
Jun 06, 2006 (7:39 pm)
I think the oil life indicator was meant to measure regular oils and not longer life synthetics but perhaps is good for both. As mentioned in earlier messages I would not let the indicator go much below 50%, 5000 miles or five months whichever comes first before going in for an oil change. I have at this point never used synthetics but am open to the idea. As discussed in previous messages I drive on paved roads, 2/3rds highway and 1/3rd in town with not very much bumper to bumper stop and go. The final significant variable is the climate, very rarely above 65 degrees in summer and only about 30 days of the year that temperature falls below freezing (late night, early morning). Another factor is that the car is parked in an insulated garage.
Having appreciated the comments received here so far I am moving in the direction of 5 months, 5000 miles and 50% whichever comes first. Further comments welcomed and appreciated.