1st oil change no MPG increase?!?

[KandyRedCoi]

thanx everyone i will try that and report back

[Bob64]

Originally Posted by a priori

Many folks (myself included) experienced a drop in mileage after the first oil change. The reasons? Could have been too much oil or it could have to do with the tire rotation. Sometimes the tires are a bit "sticky" at the beginning, so mileage often will increase with greater tire wear.

Maybe you've just conquered the MPG drop by improving your driving techniques!?

I have a unconfirmed theory:

According to unverified sources, the prius is filled with 0w20 synthetic at the factory.
It's a fact that synthetic oil can last for at least twice the change interval (10,000 miles) according to various used oil reports posted here.

So you shouldn't notice any difference if you use a synthetic oil replacement. However, when people use conventional oil as their first oil change at the dealer, they get a drop in mpg because conventional is less slippery. (plus it may be overfilled)

Thats my current two cents anyway :P

[Genoz World]

KANDYREDKOI, i changed my oil at 1800 miles.....when i did so, i had a very reliable source tell me that the 08 engines are built at a much tighter tolerances than the years before. now, same engine, same this and that, but the tolerances are much tighter. so, in turn, he suggested that i use lighter engine oil. NOT being able to find the 0-20, i just went to PEPBOYS and got MOBIL1 5-20W. ***********when i did this, i saw a good increase in gas mileage, somewhere between 3-6 more mpg, i used the stock, factory oil filter.

now, on the same subject, i heard that the tourings do loose 1-3 mpg versus the stock prius's due to the tire/rim combo. **********i regretted NOT getting a touring, and there are some touring TC's here that get better than my mileage, so this could or could not be true.

then, i would suggest that you read dr. fusco's suggestions on actually driving the prius with fuel efficiency in mind. it's a very good article and it will definitely help you get better fuel efficiency.......

PUMP UP THE AIR ON THE TIRES!!!!

last but not least, challenge yourself to drive the energy screen and/or consumption. keep the mpg as high as you can. when you see the gauge read 25 mpg on the freeway at 75+ mph, slow the heck down and get it to 50mpg or even 75 mpg. accelerate only when needed and hold the throttle steady to get the most efficient mpg. just try this for one week and let us know your results.

good luck!!!!!!!!!

[KandyRedCoi]

my findings so far:
dropped hwy speed from 75mph to 70mph, seemed as if I got worse mpgs?

Increased tire psi to 40psi front and rear, didnt see any increase or decrease in mpg

Will test more after memorial weekend, thanx again everyone!