You're luck to live in the USA, we in the UK are paying upward of 90 pence a
litre for our petrol.......

coupled with the

Artie

Tire pressure and oil are not going to make a significant difference. Do
yourself and the planet a favor and but something more economical for
your long commute. Not to mention how fast the value of your Titan is
falling with all those miles.

The difference in mileage between 5W20 and 5W30 is going to be trivial
for you (maybe 2%). Why take a chance with the life of your engine for
that? Ford and Honda did extensive testing before recommending 5W20.
Nissian either did not test 5w20, or did testing and had poor results.

Ed

I can't imagine this would give a noticable difference in MPG. You'd be
lucky to see .5 to 1 MPG if that. Sure not going to make it use fuel like a
Civic!

if you are worried about 5w20, call your local nissan dealership and
ask 'em.. ask to speak to one of their technicians. they are usually
willing to answer a quick question.

the oil is not going to make enough of a difference to justify keeping the
truck.
-----------
Alex

Using non approved oil will void the warranty.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Changing to an oil not recommended by the maker might void the warranty
- check with the car maker first.  Any change in milage will be minute
I would think.

With a car called the "Titan" I think there are far better ways of
improving milage.  If mpg is what you want to improve then take your
wife's advice and switch to a smaller car.

900 miles a week - wow that's almost 200 miles a day!  I don't know
what money you have tied up in the Titan or it's age, but you will take
a financial hit by selling it if it's fairly new, so just remember to
factor in what it will cost you to give up the Titan and buy a smaller
car.

I bought my 98 Nissan SE just for commuting--150 miles a day--5 days a
week.  Even that cost a lot in gas.  But the thing that really added up
the $$$ was maintenance--just the normal stuff,  needed a set of 4
winter tires (Michelin X-ice), replacing worn out tires, replacing at
least one windshield a year, etc.  Lucky for me, it was pretty reliable.

Eventually, we got in a car pool--4 of us (can't do that very well in a
truck).  That really cut down on the expenses.

Then we hit the jackpot:  we got enough people to form a vanpool-with
the van provided by the council of govts. here in Colo Springs.  We are
up to 11 commuters in our vanpool.  We have a 15 passenger 2000 Ford
E350.  It sucks up about 10-11 gallons a day.

BUT--

We pay only $135.00 a month each.  That includes gas, insurance,
breakdown coverage, maintenance, and free emergency ride home (2 per
year, if needed, in a taxi, or rent-a-car).  And our workplaces provide
us with $100.00 in Commuter Checks per month.  So we pay $35.00 a month
each.

BUT--

The driver gets to ride free.  We take turns driving, so each month we
draw, to see who got the free month!!!

On the negative side, one of us (me) has to take care of the van, gas it
up, get it washed, and take it in for maintenance when due.  One person
also has to collect the money, and makes up a driver schedule, and a
schedule of who is off each day.  And for the drivers, we had to get
approved, and take an on-line defensive drivers' course.  And we have to
try to get along with each other and each other's idiosyncracies.

Check your community, and see if they offer a carpool or vanpool
program, if it is a popular route you take.

(End of verbose mode--sorry)

Jim