E10 E5 Fuel

[Clutha]

39 minutes ago, Bazzer1955 said:

I don't understand why people don't just use E 5, more mpg, a better running vehicle, E 10 does not give as much mpg therefore the cheaper price is irrelevant, and we still get people saying that the E 10 vs E 5  scaremongering.......weird world we live in

Picked up my new to me Alphard last week and called in for petrol on way home, no E5 at Esso garage 🙄

Huge price difference in our area, maybe 50/50 blend is the answer when filling up to max?

[Chris.ac]

On 4/4/2023 at 7:54 AM, Bazzer1955 said:

I don't understand why people don't just use E 5, more mpg, a better running vehicle, E 10 does not give as much mpg therefore the cheaper price is irrelevant, and we still get people saying that the E 10 vs E 5  scaremongering.......weird world we live in

Running temperature and preignition and compression. 

You should change the sparkplugs to match the new temperature range. 

 

The e5 e10 due not matter, but in the UK e5 is usually greater then 95ron.

 

If you use this in the engines designed to run on 89 to 95 ron, you need to generate more heat in the spark plug to ignite the fuel, as higher ron is more compressible before ignition. 

 

This means you have a higher energy drain from the alternator/battery, a hotter engine, and an ecu that is trying to correct fueling trim levels more often. 

 

E5 95+ron fuel is used in the higher compression engines. 

 

The argument only applies to the 3 and 3.5 litre, as these are designed to use higher ron fuel. 

 

2.4 only needs 91ron, which in the UK usually means e10, the fuel economy part comes from the calorific value of e10 vs e5. 

 

E5 in a 2.4 may provide more mpg, but be aware of the ron value. 

Edited April 8, 2023 by Chris.ac

[xxdrteethxx]

Toyota FSE engines are direct injection or dual injection, direct and port. They need to run on a premium fuel because they are leaner, less flammable. If you tried to run them on standard petrol you will suffer with pre-ignition and your car will run terrible if it all (some models won't allow it). Most cars with lower compression rates and port injection run on standard fuel, more often than not. As for the ethanol ratio who knows, but Toyota's are built to last. It would be nice to see more fuel economy figures from the 20 series. I will try to sort some out on our trips this year.

[Rojie]

12 hours ago, xxdrteethxx said:

Toyota FSE engines are direct injection or dual injection, direct and port. They need to run on a premium fuel because they are leaner, less flammable. If you tried to run them on standard petrol you will suffer with pre-ignition and your car will run terrible if it all (some models won't allow it). Most cars with lower compression rates and port injection run on standard fuel, more often than not. As for the ethanol ratio who knows, but Toyota's are built to last. It would be nice to see more fuel economy figures from the 20 series. I will try to sort some out on our trips this year.

 

Hello Alex,

 

Welcome to the Forum.

 

This fuel debate has been ongoing since E10 was introduced.

 

As far as I know, the FSE engine is not fitted to Alphards/Vellfires; certainly NOT the Gen 1 machines.

Regarding the Gen 2, I stand to be corrected.

[xxdrteethxx]

Hello Rojie! I thought I would add, the 2AZ FE fitted in the Alphard/Vellfire is also fitted in one of the most common cars in America, the Camry. This car runs on the lowest grade American fuel (which is absolutely terrible) just fine. As far as fuel economy goes, it doesn't really make sense for the Alphard to use a premium fuel to get better fuel economy. Cheaper fuel burns easier, and because we aren't using a performance engine or a tuned 2AZ, there's really not a worry about pre-ignition. I do want to run tests still, data is always the answer. 

 

 

 

[Rojie]

2 hours ago, xxdrteethxx said:

Hello Rojie! I thought I would add, the 2AZ FE fitted in the Alphard/Vellfire is also fitted in one of the most common cars in America, the Camry. This car runs on the lowest grade American fuel (which is absolutely terrible) just fine. As far as fuel economy goes, it doesn't really make sense for the Alphard to use a premium fuel to get better fuel economy. Cheaper fuel burns easier, and because we aren't using a performance engine or a tuned 2AZ, there's really not a worry about pre-ignition. I do want to run tests still, data is always the answer. 

 

 

 

 

I believe most of those engines used in the USA were made in the USA, and did have issues.

 

Fortunately, these issues were not present in Japanese made engines as included in JDM imports to the UK.