Doh!

I just purchased a 2003 Altima 2.5 with Automatic transmission. I noticed that at higher speeds my rpms were real high (not red line). It finally dawned on me that I was driving in third gear, not drive. Is it possible that I have damaged my engine?

[420sx]

It is possible, but unlikley. other than burning a lot of gas you should be fine. unless of course she sounds damaged

Thanks for the reply. She doesn't sound damaged, but I sure the hell am getting better mileage.

What's your take on using synthetic oils?

[420sx]

some cars love it, some burn it away like like the smot i poked last night, however you have a fresh whip so I doubt it will burn it away.
my advice: after youve broken the engine in give it a try, once you get to know your car she'll let you know what she likes

I waited until 500 miles, and then switched to Mobil1 Full Synthetic New Car Formula. I figured my brake-in period was less than typical so what the hell.

I don't understand why some cars burn away the synthetics. I have read alot about synthetics, and Red Line, AMSOIL, and Mobil1 all admit that under normal driving conditions (like having the car in drive not third, man I feel like such a dolt) the benefits of synthetic oil are less than under harsh/racing driving conditions.

I had a 2000 VW Passat V6 that seemed to burn it, but I got better MPG than with mineral oils.

[420sx]

my 240 burnt it soo badly that after about 1500 mi I think i only had maybe 2qts oops, probably should have checked that sooner.
oh well gettin a new block anyways.

[Coco]

Welcome to the boards. Check out the 3rd gen Altima section for any issues that may arise.

[Shift1.6]

Full synthetic oil is one of the best things you can do to your car. Its a good maintenace too. My car loves it.

Welcome to the forums... Valvoline 10w-40 every 3,000 miles baby....