Tarago V6 3.5L engine and fuel type

[Alex_ft]

Hi Everyone,

Just wonder which fuel type do you use for your Tarago V6 3.5L ?
Official site says premium 95 fuel is a must http://www3.toyota.com.au/tarago/specifications/gli-v6-auto. However, for other models with the same 2GR-FE engine, e.g. Kluger or Aurion, it's Ok to use 91 unleaded. Any clue why? Did you try to use 91 for Tarago V6 and if yes, did you notice any difference?

Aurion spec http://www3.toyota.com.au/aurion/specifications/at-x 

Kluger spec http://www3.toyota.com.au/kluger/specifications/gx-5d-automatic-2wd

[campbeam]

"it’s an unmitigated disaster to put a lower-octane fuel in an engine than the one recommended by the manufacturer. This can lead to severe engine damage. The early detonation of the fuel can raise the temperature inside the combustion chamber to levels that the metal parts inside the engine can’t withstand, and unacceptable stresses are also placed on internal components." 

The above was an extract from the following URL http://www.caradvice.com.au/93272/what-fuel-should-i-use-in-my-car/ 

Suggest read this URL https://en.wikipedia.org/wiki/Octane_rating 

The following may be the answer to your question : "be sure to check your vehicle owner’s manual. Ordinarily, a vehicle will not benefit from using an octane higher than recommended in the owner’s manual. However, some car models have high-compression engines and electronic controls, which are designed to benefit from the greater power output and improved fuel economy of high octane fuel. Since octane requirements can vary with operating and environmental conditions, your vehicle may need a higher octane fuel than recommended to prevent knocking." https://www.exxon.com/en/octane-rating

As for the explanation of the different specifications between the models, I am guessing that this is due to the different programming in the Engine Management System for each model.

In my Aurion [done 180,000Km], I usually use 91 but I am currently using Shell V Power 98 to hopefully/as claimed clean the intake valves and fuel system. Initially, more of a placebo effect, going faster because I was using the accelerator more and then having to brake harder. Probably say there appears to be a bit of an improvement in smooth acceleration. 

Anyway as per the Toyota specifications only 1-2 KW difference and a few Nm between the models and 91 vs 95 minimum RON.

[willister]

On ‎2‎/‎09‎/‎2016 at 11:31 PM, Alex_ft said:

Hi Everyone,

Just wonder which fuel type do you use for your Tarago V6 3.5L ?
Official site says premium 95 fuel is a must http://www3.toyota.com.au/tarago/specifications/gli-v6-auto. However, for other models with the same 2GR-FE engine, e.g. Kluger or Aurion, it's Ok to use 91 unleaded. Any clue why? Did you try to use 91 for Tarago V6 and if yes, did you notice any difference?

Aurion spec http://www3.toyota.com.au/aurion/specifications/at-x 

Kluger spec http://www3.toyota.com.au/kluger/specifications/gx-5d-automatic-2wd

Hi,

I own a 2012 GLX Tarago and I think from memory (don't quote me) it says 95RON is recommended on the manual/handbook, not sure it it's a requirement though. Additionally see this article:

http://www.motoring.com.au/toyota-tarago-v6-2815/

It was written in 2007 but I think the engine for the V6 is the same. Second last paragraph of the article states:

"Running 10.8:1 compression, the V6 has preference for premium 95 RON petrol, yet accepts standard 91 RON without complaint."

I pretty much use 91 RON but probably use 95 RON once a month per refuelling. I have a relative with the same car/engine albeit being a bit older - a 2010 GLI V6 Tarago. She and her husband always uses 91 RON.  Personally I'm not sure if its a placebo effect either but I feel it's slightly smoother/tinge more powerful when using 95 RON.