My daily commute has just increased (due to a new job) from 22 miles per day to 115-120 and I am now racking up about 900 miles per week on my Titan. Needless to say, with gas prices above 2.50 a gallon coupled with the thirsty V8 engine and heavy weight, I am spending a small fortune on fuel costs. I am ok with it as I really enjoy driving my vehicle...However, the wife is pressuring me to get rid of it and buy a fuel efficient Civic or Sentra. My mechanic recommended that I do things to improve fuel economy such as keeping the tires properly inflated, the wheels aligned and air filter clean.... The tires were inflated properly and the wheels were not out of alignment as the vehicle is still relatively new.....My mechanic mentioned that many auto makers have switched to 5w20 motor oil as it offers better fuel economy. He said Ford and Honda use it extensively and that Nissan makes a great engine and can easily run well on it. He said to use exxon 5w20 as it contains an additive called molybedunum (sp) which will help protect the engine better. I'm hoping that this will improve mileage to the extent where my wife won't pressure me to dump the truck, but I am concerned about voiding the warranty....Has anybody gotten good results with 5-20 oil in a vehicle that did not spec it? Is it safe for me to go ahead and use it for at least one tankful to guage the impact on fuel economy?TIA,Jim

You're luck to live in the USA, we in the UK are paying upward of 90 pence alitre for our petrol.......coupled with theArtie

Exxon 5w20 oil for 5.6 Nissan Titan - Will it void warranty?

Jul 30, 2005 21 Replies

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John S. 20 years ago

Good deal. Since the Springs ain't that big, I've gotta ask how you would accumulate 900 miles in driving a week. Denver isn't that far...Cheyenne maybe?

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Jim 20 years ago

I work a little bit more than 75 miles away from my house. 150 miles round trip times 5 = 750 miles plus weekend and personal mileage on vehicle. I admit it's not 900, but its close enough to what the original Jim posted for me to respond. If it's a good deal for me, it would be a better deal for him, if he could get in an arrangement like this.

Jim

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