99solarai4 wrote:
So now if you don't own something you can't know anything about it? You must own a lot of stuff b/c you seem to know everything. Perhaps you can educate me. What octane fuel does Toyota say to use in the 1MZ-FE?
87 octane, but for improved performance, premium grade fuel is recommended....NOT required. Because the 1MZ-FE is a high compression motor, it will benefit from high octanes unlike the low compression 5S-FE or 2AZ-FE. Also, the 1MZ-FE has knock sensors which retard and advance timing according to the fuel octane you do select as soon as it detects knock/ping. Using premium fuel in a N/A 5S-FE or 2AZ-FE will be a total waste...unless you have a poorly serviced motor with alot of carbon buildup in the motor which causes excessive ping/detonation for most 4cyl engines. A well maintained 5S-FE or 2AZ-FE shouldn't experience any sort of ping under WOT or with the A/C on during a grade climb.
Personally I use 87 and occassionally switch to 89 octane since most of my driving is freeway and some city. Yes you are right premium is a waste if your car doesn't need it...epsecially on a 5S-FE. For a 1MZ-FE motor, it will only benefit it since it's designed to benefit from higher octanes considering the high compression. Because there are knock sensors for the 1MZ, it allows lower octanes to be used safely. For my car, I notice a difference in acceleration using 87 or 91 (which is premium here in CA). It's almost like night and day. There's more hesitation when you accelerate hard using 87 octane. I have a 5speed manual SE V6 and it's very evident. It's also evident with the 1MZ-FE powered 95 Avalon XLS 4spd Auto ECTi I previously drove before the Solara. There is huge hesitation between shifts. As for mileage, i get the exact same mileage using Regular, Plus or Premium. I only use Costco, Chevron and sometimes Mobil...whichever has the best price.
You don't own or probably have never driven or even worked a 1MZ-FE powered vehicle so why even talk about like you know it? I've driven several variants of the 1MZ-FE and worked on them (auto/manual Camry and Solara, Sienna, Avalon, ES300). Because in reality you really have no idea.