- #7650 of 8536
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Oil change and fluid check 2003 Jetta
by wjose
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Dec 16, 2007 (1:56 am)
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Replying to: ruking1 (Jul 18, 2007 7:35 am)
My wife owns a 2003 Volkswagon Jetta and it is time for an oil change and fluid check. The car has about 30,000 miles on it and haynes or chilton has not come out with a repair- service manual for it. The car is much different from my own vehicles which I have serviced for years. Other than Volkswagon, where could I get some information and illustrations that would make my job tolerable since I have heard that Volkswagons are a different ballgame than American vehicles. I would greatly appreciate some reference points.
Bill
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- #7651 of 8536
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Re: Oil change and fluid check 2003 Jetta [wjose]
by ruking1
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Dec 16, 2007 (8:01 am)
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Replying to: wjose (Dec 16, 2007 1:56 am)
You might look/google for a new/used Bentley's CD and/or soft cover shop manual. If you really want to get into it, you can get an again new/used VAG.com, which is the software and hard cabling for laptop hookup.
As a fast answer, I would use Mobil One 0w40 and oem, Mann or Mahle oil filters.
https://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_0W-40.aspx
You might also review the technical data updates for the latest recommendations for oil specifications. Rest assured however the Mobil One0w40 meets and exceeds the ..."VW 502.00/505.00/503.01"...specifications in force at the time. The latest specifications are the VW 507.... which (selectively) are backwards compatible.
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- #7652 of 8536
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Re: Oil change and fluid check 2003 Jetta [wjose]
by blufz1
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Dec 16, 2007 (8:52 am)
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Replying to: wjose (Dec 16, 2007 1:56 am)
Just shop on the phone and the net for special price and/or a coupon and get a deal from your dealer. My Honda dealer charges me $10 + I provide the mobil 1 oil and filter........'course you ain't got no Honda,there.
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- #7653 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [ruking1]
by robert1955
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Dec 21, 2007 (10:41 am)
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Replying to: ruking1 (Nov 13, 2007 8:26 am)
Ok, time to pop back in here  I have made the switch to a 0W-20 Group IV product for my 5W-20 spec 07 Sonata. Its only been about 600 miles and 2 tanks of gas but I have noticed between a .5 and 1 mpg gain but its too early to credit the oil for a gain yet. After about 5,000 miles I will have a good dataset to say if the switch from a dino 5W-20 to a Group IV 0W-20 will pay off for me with better economy along with the longer OCI to truely cover the cost increase.
As for the Amsoil zelots the true gains in using the product is the longer OCI the oil is built to support, if you stay with under 5,000 or even 7,500 mile OCI's then the extra cost does not justify its use. If you can run the 25,000 miles for the ASL or even the 35,000 miles of the SSO oils then yes I would say Amsoil "outperforms" the other oils
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- #7654 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [robert1955]
by highmiler650
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Dec 21, 2007 (11:01 am)
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Replying to: robert1955 (Dec 21, 2007 10:41 am)
Here is someone who did an OCI with over 30k miles. He did use 0w-30 though.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1035939#- Post1035939
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- #7655 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [robert1955]
by ruking1
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Dec 21, 2007 (11:05 am)
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Replying to: robert1955 (Dec 21, 2007 10:41 am)
I essentially did the side by side documentation and by default, comparison over 2 intervals of 10,000 miles each. It was on a Honda Civic, 5w20 conventional OEM fill vs a change to 0w20 Mobil One. The greater mpg was noticed (documented) IMMEDIATELY on the very next FULL tank full (on synthetic) and continued to the so called last tank full at close to 20,000 miles. So I have an average mpg over "old oil vs new oil" (virtually no difference in avg mpg)
It is pushing 60,000 miles at the so called elevated mpg. It was my intention to run the full OEM recommended OCI interval (10,000 miles) as per Honda recommendation, AND to switch and STAY with Mobil One 0w20 to 5w20 (group IV). So in that sense, it was NOT/never an A/B experiment. However, there is NO doubt in my mind that I would LOSE (avg over another 10,000 miles OCI) mpg, upon switch back to a conventional 5w20. Additionally passed the meager warranty period I run 20,000 miles OCI's. Again for the additional 10,000 miles, same/same (watching paint dry here comes to mind) mpg. i.e., no change.
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- #7656 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [highmiler650]
by shipo
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Dec 21, 2007 (11:39 am)
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Replying to: highmiler650 (Dec 21, 2007 11:01 am)
Interesting UOA link. That said, I'm thinking that the claims made by the OP are a bit suspect. Why? Because he initially claims that he never added any make-up during the entire 30,000+ mile run, and all requests to confirm that statement went unanswered. The fact is that he had six UOAs done during the that period of time, and I'm thinking that at the barest of minimums he used 24 ounces of oil just for the samplings taken, which means that that either the Explorer motor didn't consume even 8 ounces of oil over 30,000 miles or he ran his engine below the "Min" hash mark on the dip stick. Sorry, not buying, my bet is that there was make-up oil added that wasn't reported.
Best Regards,
Shipo
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- #7657 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [shipo]
by ruking1
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Dec 21, 2007 (11:52 am)
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Replying to: shipo (Dec 21, 2007 11:39 am)
Actually several point came to mind reading your post. The most important distinction is ANYONE can double their OCI by doubling their sump!!
Baring the doubling is understanding the modifying variables.
So almost a sub variable but might be considered a main variable:
1. a percentage increase due to the greater "sump" with the addition of a bypass oil SYSTEM
2. use of a bypass oil filter.
3. Refreshment is NORMAL but "refreshment" for any condition indeed alters dilution rates, etc. Again, not a BAD thing.
So indeed at BEST the documentation is sloppy. With no response to inquires, I would concur with your assessment.
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- #7658 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [shipo]
by highmiler650
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Dec 21, 2007 (1:57 pm)
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Replying to: shipo (Dec 21, 2007 11:39 am)
He claims that he has a FUMOTO valve, which allows for easy oil sampling.
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- #7659 of 8536
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Re: Mobil1 0w30 vs. Castrol synthetic 0w30 (German made) [highmiler650]
by ruking1
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Dec 21, 2007 (2:33 pm)
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Replying to: highmiler650 (Dec 21, 2007 1:57 pm)
Right! I can use a "thru the dipstick" evaculator as another method to draw samples, as well as drain the oil. But quite off topic to both our responses is I wish EVERY car had a fumoto value or through the dipstick evacuator!!!!
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