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Audi SUVs (Q7 & Q5) Discussions area for Audi Q7 and Q5 TDI (2009+ in Canada & the US).

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Old January 4th, 2018, 15:42   #1
phoosty
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Default Q7 TDI a good fit for me?

Hello Q7 TDI'ers,
New member, first post. A little background on me: wife's MDX is getting old and I've always liked the Q7 as a step-up 7 seater option. In particular I like the idea of a TDI, having driven a Golf TDI in Europe back in the day, loving the mileage and the torque and the range. I found this forum in order to do some research on a potential (new or very slightly used) 2015 Q7 TDI purchase, as they seem to be coming out of the dealer woodwork in no small numbers these days.
The role of the wife-mobile is two-fold:
Weekdays: lots of very short cross-town trips, shuttling kids or going to/from local work.
Weekends: longer, and fewer, trips out of the area for various sports matches, getaways, etc.
My question/concern is that I have read here that the TDI does not like short trips where the engine never really comes up to temp, as it needs to get to a fully warmed up state to get into regeneration cycle.
Would the weekend only longer drive(s) be sufficient to maintain the health of the engine, given a weekday schedule of sometimes up to 10 short, 0.5-3 mile trips per day, where I'm sure the engine would never achieve a fully warmed up state?
thanks for any BTDT insight,
/Peter
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Old January 4th, 2018, 17:57   #2
Mythdoc
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Lots of short trips is not ideal for fuel economy, though of no danger to the engine, AFAIK. On my Touareg that type of use resulted in mpg at the bottom of the stated range, sometimes lower. 17-19 mpg.

I'd stick with a gasser if the short trips represented 75%+ of the vehicle use. More selection out there, simpler maintenance, and more reliable market dynamics for purchase and resale/
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2011 Touareg TDI 74K Miles (sold back to VW, May, 2018)
2015 Golf TDI 16K Miles (son’s)
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Old January 4th, 2018, 18:06   #3
Trade Wind
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+1

TDIs are not meant for short trips. If you haven't, test drive a gas Q7. The cars themselves are phenomenal, regardless of fuel.
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Old January 4th, 2018, 20:14   #4
phoosty
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Thanks. The dilemma is that the need is truly dual purpose. Most of the miles would be accumulated on longer trips on weekends (including mountains/snow), but most of the abuse would come from short weekday trips. We're averaging about 9.5k annual miles total on this vehicle.

My hope is that I can make a TDI work because:

1) You can still buy brand new (or practically brand new) ones.
2) I'm not interested in a new gasser Gen II as they look like like a minivan on the outside, and I also prefer the more analog look of the Gen I interior.
3) I dig the unique character of a Gen I TDI.

The mileage issue is essentially the same for diesel or gas, short drives result in poor fuel economy regardless, and resale value is not a significant consideration either, as I'd intend to keep the vehicle for the long term.

What I'm trying to gauge is whether the TDI can handle the admittedly less than ideal, short midweek drives, offset by the long trip weekends, without gradually screwing it up?
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Old January 4th, 2018, 22:29   #5
da.hs
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If the longer drives are most weeks, or perhaps at least once a month, it should be just fine. My pattern has been 25 miles into town, park several hours, several short hops around town, 25 miles back. Occasional very long trips.

I've never been conscious of the Q7 doing regens, I don't know what the interval is. I was certainly conscious of my Golf doing them: about every two months it would run the fan after parking and smell a bit strange. I think its regen interval was about once per tank and I only noticed the ones where I stopped while it was in process.

I don't know my Q7's life history but its previous owner was a city dweller, presumably many small journeys. 110k miles in 8 years, only slightly higher than you envisage.
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Old January 5th, 2018, 03:31   #6
BarryT82
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A TDI will be fine. Get a tune and you’ll love it.
How are TDI’s not ideal? People in Europe rarely drive long distances and almost every vehicle is a diesel. My wife and I drive 12 miles each way to work and we’ve owned 4 TDI’s without any issues.

Last edited by BarryT82; January 5th, 2018 at 03:33.
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Old January 5th, 2018, 07:06   #7
Mythdoc
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My Touareg was driven around town most of the time, except for three 2200 mile round trips on the highway every year during school vacations. If you are drawn to diesel, plan to keep the car a while, as you say, go ahead. The short trips will not harm the car in any way that I know of.
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2015 Q5 TDI 25K Miles

2011 Touareg TDI 74K Miles (sold back to VW, May, 2018)
2015 Golf TDI 16K Miles (son’s)
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