We have a 2008 RX 350 and I have been using 92 octane but I have read several posting of other owners that use 87 and 89 is that ok to use?
Yes. Computer will retard timing to prevent any knock. You might lose a few horsepower and MAYBE ~1 mpg. I used 87 octane in my 2007 ES350 for 4 years and 70K miles with no issues and still got 32 mpg highway at 70-80 mph. New RX's have been released requiring only 87 octane.
Last night I refueled the 350 and it made me $70 poorer (for 323 miles). The average is about 19.5 MPG now. On the side note, my 450h can EASILY get over 29 mpg.
The first picture is city driving after fuel up. The second picture is highway driving (65-75 mph) after 60 miles.
2010 RX350 AWD Matador Red Mica, HID, Navi
2012 Tacoma DCLB TRD Sport 2010 RX450h AWD Obsidian/Black, LED, Navi - Sold
2007 IS250 AWD Matador Red Mica, HID, Navi - Sold
2011 Camry SE - Sold
2002 4Runner Sport Edition 4WD - The BEST vehicle I have ever owned.
my 2011 RX 350 get's 19 on the city and 23-24 on the highway.
i have switched to regular unleaded (87) and noticed to difference.
i guess members confuse the decrease in hp vs mpg.
Using 87 vs 91+ gasoline, in my opinion decreases the Horse power by 4
with little to no effect to the mpg.
Location: France, South, living close to Montpellier
Here is my last consumption in L/100km (France) with winter tires.
It was at the end of a trip on motorway (130km/h or legal speed limit)
The last line is 10l/100 km limit and the last 15minutes was from motorway toll gate to home/garage
Another picture with a mix between city drive and small roads around city some days before
Be the change to wish to see in the world