matts6887

How often realistically should oil changes be done? I originally heard just every 5000 miles;l however; when i talked to the shop I do oil changes at they looked it up in a lexus manual and it does say every 5000; however; since down here in the phoenix, az area; we are in a heavy duty usage area(or something like that dont recall exactly what the guy said it was called) because of the intense summer heat; and because of that it is really reccommended to be done every 3000-3500 miles. And oh yes the 5000 mileage interval was reccommended if I was running a synthetic blend which is generally what they use if I dont do high mileage oil. Is it ok to go every 5000 like Ive been doing; or should it be done sooner?

sktn77a

iTrader: (2)

The old 3000 mile interval went out with the dark ages. Most vehicles using Dino oil are good for 5000 to 7500. Unless you are hauling farm equipment 24/7 (which you shouldn't, given the RX300 transmission issues) 5000 should be just fine. With full synthetic, you should be good for 10000. I can never understand why anyone would use a synthetic blend(?)

matts6887

Well; that is what the shop I normally go to uses. Its not cheap junk stuff either its Penzoil so its not some low quality stuff. As far as the blend goes; well from what they told me its because the blend has some additives or something(again dont recall exactly the reason) that is a bit better than using regular run of the mill oil.