Kha187

Hello everyone. Just traded my 2011 Toyota Prius 160k miles for a 1999 Lexus LX 192k miles. The car is used a little rough (which is what it’s meant for). However my main concern is that the previous owner only used regular (87) gas/fuel in it. How bad is this and what should be my next process as I want to start putting premium (93) gas/fuel in it again.

ps- Will this last me another 50k miles? This is my dream car and I don’t wanna see it die because of the wrong fuel the previous owner put all its life.

hankinid

We drive a 2001 LX that just turned over 200K...I bought it used with ~ 70K. We've used both regular and premium gasoline, primarily no-ethanol as it's available in our general area. Ethanol gas tends to degrade (melt) rubber fuel lines over time. Iirc regular unleaded here is ~90 octane and no knocking when driven. Absent no-ethanol gas,,,pay close attention to ethanol percentage..e.g., .my 2013 Land Cruiser says NO 15% ethanol on the gas cap. The question tends to end up in a pissing match. ;;

The fact that 87 octane got it through 160K means it seems to work. Congratulations on the new truck. More info, including a long dissertation on octane is on ih8mud.com in the 100 Series section.

Kha187

I see what you are saying. Do you recommend I switch it to 93 right after it empties? Is there any thing I need to do to to flush out the gas tank or just start putting the 93 in it directly after the 87 emptied.

thanks a lot, I’m new to this and am totally lost on what to do.

hankinid

I'd try something around 90 octane or so and see if you feel a difference...if you don't feel a difference, keep up with the 87. Go with non-ethanol if it's available and priced reasonably.

hankinid

https://forum.ih8mud.com/search/5451...ctane&t=post&c[child_nodes]=1&c[nodes][0]=26&o=date

hth