Oil for the gen 2

I immediately noticed a slight MPG improvement on long trips when my Gen2 switched to 0W-20... And because this is recommended oil for Gen3 Prius, it seems congruent with what their recommendations were as they changed over time.

 

Ask a service department or two? I don’t think there’s been a gen 2 oil spec revision from Toyota? You can get synth 5W30, if that’s your concern.

 

Im using 0/30 now all time in Gen2

 

245k on my gen 2 Prius. Burns a bit of oil. So I top 1 quart after 1200 miles and do oil change 2700 miles (as it comes near low level). I use the Walmart quaker state synthetic blend 5w30 .
Any recommendations for the type of oil to use so I don't have to bother for 3000 miles?

 

You might want to try full synthetic and see if the oil stays cleaner longer... This is a normal amount of oil burning for 1/4 million miles and there's no need to change the oil entirely when it gets old after adding the first quart, just keep adding more. As in 3K miles is way too soon and wasteful, especially if you use a full synthetic that's good for 10K miles. Though on older engines like yours I do it at about 8K miles. And once you're burning significantly more than a quart every thousand miles you're gonna wanna do an engine swap with a lower mileage used one, which are much more affordable than you might think.

 

Is adding any high mileage oil additive useful at all here ?

STP High Mileage Oil Treatment + Stop Leak - 15 FL OZ - Walmart.com

 

M1 0w20.

 

Mobil-1 5w30 with Motorkote in both my Gen 2 s.

 

How many miles on your gen 2 Prius?
How often you do oil change ?
Do you have to top it off in between oil changes ?

 

245k on the 2005, 165k on the 2004. Change oil ever 10k. No oil needed on either between oil changes.

 

That's interesting. Walmart has mobil 1 5w30 fully synthetic but they recommend oil change every 5k miles for it.

 

10,000 mile oil change intervals and you require NO oil to be added between changes? And the oil level is still on the dipstick when you hit that 10k point?

 

Yes, believe or not no oil between oil 10k changes, both cars, maybe it's the Motorkote.

 

I took advantage of 46* nice weather this past Sunday after reading another oil-change thread. My ’05 G2 just turned 179,000-laps. Since a coupla months after I got it and tuned it to the edge ... I’m getting 60-mpg. I do however drive like a general grandmother. It burns NO oil. I’ve never had to top it off.

I go with the top-line oil filter from whatever store I’m shopping at; this time NAPA. And I use 1-qt each of the following products. Hey look ... It’s just me ... That’s the way I roll. I’m funny like that.

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Mine was giving 46 mpg after I used stp high mi oil treatment....but now back to 42mpg without it...I didn't find the stp high mi oil treatment so just added the regular stp oil treatment...maybe that's why.
I use the synthetic blend 5w30 quaker state oil

 

anyone else with high mileage gen 2 Prius - is full synthetic 5w30 the way to go ? How often is your oil change if you use full synthetic 5k? Do you top off in b/w oil changes
Any ideas of improving mpg? 42 seems pretty low

 

By-the-way ... I don’t think the oil-change had all that much to do with the MPG that I get, other than maybe that I do change it regularly. The 60-mpg that I’m getting is from the “Grandmother” way that I drive. Nobody is ever gonna confuse a G2 with any kinda sports-car ... and I certainly don’t drive it like one. I’m the guy in the right lane that everyone blows around as soon as they can. I stay within 2-mph of the limit and rarely-if-ever go over 65-mph. I glide into stoplights and never blow out of them. I use cruise-control whenever I can. I bought the 0W-16 this time because ... why not? I ran a race-car for an entire season on Rislone. I love the stuff. Hy-per Lube is also a Rislone product. The reputation of Lucas products speaks for itself. I’m not at all telling anyone to use what I use. I’m just saying that I like what I use and I’ve got a really good history going with what I use.