Hi Elle: After seeing your post, I looked up the Viva 2 tires at
Walmart and they are listed as 175/70R13, not 165/70R13 as specified
for the 91 Civic. If you find the 165's at Walmart, please drop a line.
I am looking for a new set of tires for my own 91 Civic, but the 165's
are now very hard to come by (Yokohama still makes them, but every
service place I have checked lists them as on backorder).

By the way, as Grumpy notes, your Civic should last another 100K miles
easily. I am planning to get mine beyond 250K one-way-or-the-other.
Your infrequent oil leak may be from the breather chamber
grommets.....if so, replace the O ring and the grommet that connects it
to the PCV, and you should be good to go.
Regards.

Elle wrote:
> Any sage advice on whether to replace the other tires or how
> to rotate them at this point?
>
> Background:
> 1991 Civic, 179k miles. One of my (then) front tires
> displayed inboard wear about 7500 miles ago. Back then I
> rotated it to the rear, did some suspension work, and think
> I found the main cause of the wear (severely worn stabilizer
> link and associated bushings). So the wear is not continuing
> (knock on wood).
>
> Yesterday I rotated the worn tire back, from rear to front.
> Subsequently I noticed steering wander towards the wear side
> of the tire. I switched my two front tires, and sure enough,
> the wander switched.
>
> Two of my other tires have 30k miles on them. The third has
> 5k miles on it (got a serious flat a few months ago). None
> of these three tires are so showing irregular wear; just
> what looks usual for 30k miles, and certainly not down to
> the wear bars.
>
> I am going to buy at least one new tire this week and change
> out the badly worn one. The tires are Wal-Mart Viva 2, size
> as recommended by Honda. Very inexpensive, consistent with
> my expectation that the car may not last more than five
> years more.
>
> I certainly do not plan on losing any sleep over this. My
> Civic drives great otherwise, averaging around 42 mpg for
> the last five fillups. Little oily down below, but not
> enough to cause garage floor spotting.
>
> I have been holding off on the alignment (mentioned some
> weeks ago) because of this, for good or bad.