Last post on Dec 07, 2012 at 3:03 AM
You are in the Volkswagen Passat
What is this discussion about?
Volkswagen Passat, Diesel, Sedan
#902 of 1046 Re: Just Got the TDI GLS Passat [tomatopie]
Aug 09, 2005 (7:08 pm)
I admit I'm new to the world of automatics, but I've been driving 3-on-the-column, 4-on-the-column, 3-on-the-floor, 4-on-the-floor, and 5-on-the-floor (all with clutches) since 1963. I'm sure the driving instructor who told me to put the clutch in ONLY when I shift and the VW mechanic who tried to politely explain to my first love (a blond) in 1965 how she ruined the throwout bearing in her cherished Beetle are both dead now, so I can't call on them to present their reasoning. However, there are some living resources available.
There are a multitude of discussions on this and related topics in other forums. So as not to offend our host, I suggest doing an Internet search if you are curious.
Information not contained in other forums is also available, and I'll provide some samples for your review.
This one address the practices of shifting an auto into neutral at traffic stops and holding the clutch down at traffic stops.
This one addresses a warning in the operators manual for Allison automatic transmissions. See page 7. I assume the torque converter style Tiptronic is similar.
Tom and Ray seem to expound endlessly on this topic, and here are some samples of their offerings.
Bottom line, as already pointed out, the practices of coasting in neutral and coasting with the clutch down are both illegal. That may explain why DKW 3=6's and Rambler Americans with freewheeling overdrives are no longer made.
#903 of 1046 Re: Just Got the TDI GLS Passat [cosmo]
Aug 10, 2005 (4:19 am)
Much appreciated! I had heard some of these things before, but always second-hand. And I figured they were as reliable as "don't go swimming after you eat" and "add ten pounds of tire pressure for long trips."
Consider me educated on this topic, even though I logged over 400,000 miles between my Civic and my Legend and never had an issue. My two cars are hardly a statistically valid sample.
#904 of 1046 Re: Just Got the TDI GLS Passat [tomatopie]
Aug 10, 2005 (4:55 am)
Anothre question re fuel economy: My Passat, as did my Acura Legend, came equipped with Michelin MVX tires. The handling is good, not great. But I did notice a drop in gas mileage, almost 10%, when I wore out the tires on the Acura and replaced them with Dunlops. The Dunlops had wonderful handling, wet and dry pavement, but wore out quickly. I then went to el cheapo Kumho Korean tires. They actually performed pretty well -- better handling than the Michelins, better fuel economy than the Dunlops. What is the general wisdom on rubber? Are the Michelins worth the high price? Can other tires deliver the same fuel savings?
#905 of 1046 A question on motor oil
Aug 10, 2005 (10:39 am)
I plan to use synthetic oils in my TDI. Change it at 5,000 then every 10,000 thereafter.
1) Should I go for the new 0W/40W from Mobil for better fuel economy?
2) Is every 10,000 frequent enough? I am driving mostly highway. Very little stop and go.
#906 of 1046 Re: Just Got the TDI GLS Passat [tomatopie]
Aug 10, 2005 (4:27 pm)
the michelin mxv tires are really top notch in so many ways. quiet. low rolling resistance. reasonable handling. the fact that they are the quietest tires is consistent with the low rolling resistance & the fact that they give better mpg. the better mpg is probably a big reason the manufacturers choose them - CAFE.
#907 of 1046 Re: A question on motor oil [tomatopie]
Aug 12, 2005 (5:27 pm)
For 04 & 05 tdi the VW gives the strict warning both in Toureg and Passat owners manuals that only 50501 5w-30 oil can be used. To my knowledge, the first two oil changes are 5k-7k, 10k for the rest life of the car.
#908 of 1046 Break-in and Maintenance on the TDI
Aug 15, 2005 (5:35 am)
I was reading some posts over at TDI Club, by posters who seem well informed. But much of what they post directly contradicts the owner's manual. For instance, the break-in period. VW says, in essence, drive gently. The guys on TDI Club say city driving, with frequent hard accelerations and running up to 3800 RPMs is good, then right up to the redline after 1000 miles.
Further, they go on at length about fuel and fuel additives. With gasoline motors, I have found every fuel additive to be a waste of time and money, except for drygas in the winter.
Do you put cetane or other additives in your diesel fuel?
#909 of 1046 Re: Break-in and Maintenance on the TDI [tomatopie]
Aug 15, 2005 (6:36 am)
I don't know about the break-in, seems to be a lot of opinions. I drove mine fairly normal during break-in.
Some folks use the additives religiously. I have a good fuel source I always try to use and I don't use the additives. I do carry some with me in case I have to fuel at a questionable spot, particularly in the winter. If it's somewhere I'm not familiar with, I'll use the additives as insurance. I'm coming up on 130k miles and have had very few problems with my TDI.
#910 of 1046 Re: Break-in and Maintenance on the TDI [sebring95]
Aug 15, 2005 (8:48 am)
How do you know what is a "good" fuel source?
I live in the Philly suburbs, with lots of high-volume gas stations -- Sunoco on the turnpike, Amoco, Exxon, Shell, Texaco, etc. I want to avoid the no-name place in the middle of nowhere, same as I did for conventional fuel -- but what else?
#911 of 1046 Re: Break-in and Maintenance on the TDI [tomatopie]
Aug 15, 2005 (9:03 am)
Well that's a start, name brands with lots of volume sales. I happen to know the BP/Amoco distributor in my area and know where to buy "bp diesel supreme" which is a very good fuel, higher cetane, very low sulphur, plus it doesn't need treated for winter. It's also more expensive, but it runs quieter and stronger so it's worth it to me. You could start chatting with distributors if you were serious about it. Find who carries the higher quality fuels. Sunoco and BP/Amoco both are supposed to have a premium diesel. There's no legislation regarding premium diesels though, so even though the pump might say "premium" like most Sunoco's, that doesn't mean it's actually their premium product.
Easiest way if you can't find out who carries the premium fuels, is to fuel at different places and see which one makes the car run better. If it gets cold and you don't know for sure you're buying premium fuel, throw in the additive. I carry Power Service (white bottle) purchased from the local wally-world for about $4 a quart. A few ounces will do the trick.