Moving to Premium Unleaded Car

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nvrau
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Moving to Premium Unleaded Car

Post by nvrau » Wed 10 Oct, 2018 5:50 pm

I'm considering a new car (B200) but it requires premium unleaded. I understand using regular unleaded risks causing problems i.e. Knocking, engine wear, etc. I'm wondering if regular unleaded with fuel additive is a harmless option?

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Chai
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Re: Moving to Premium Unleaded Car

Post by Chai » Wed 10 Oct, 2018 8:46 pm

Using fuel additives will not improve the octane rating of petrol. Suggest you don't waste money on something that doesn't work when hi-octane is readily available at a minor extra cost.
Low octane fuel is not a harmless option as you risk damaging the engine when it is driven hard.
Please read up about what pre-detonation means to the engine - that's knocking.
Chai
1974 450SLC

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T-Modell
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Re: Moving to Premium Unleaded Car

Post by T-Modell » Wed 10 Oct, 2018 9:03 pm

HI,
I'm of a different opinion than Craig: modern motors adapt to the fuel quality. I have driven my E63 AMG (2008) now for 235,000kms; it's specified for 98 Octane. However, e. g. if there's only Shell, with their hilariously priced "super fuel", I just fill up with Super (95). There's no difference in power (tested > 250km/h) or fuel consumption.

You might loose a couple of hp, which I might not notice :laughing6:
Thomas
---------------------------------------------------------------
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John Green
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Re: Moving to Premium Unleaded Car

Post by John Green » Wed 10 Oct, 2018 9:32 pm

T-Modell wrote:
Wed 10 Oct, 2018 9:03 pm
HI,
I'm of a different opinion than Craig: modern motors adapt to the fuel quality. I have driven my E63 AMG (2008) now for 235,000kms; it's specified for 98 Octane. However, e. g. if there's only Shell, with their hilariously priced "super fuel", I just fill up with Super (95). There's no difference in power (tested > 250km/h) or fuel consumption.

You might loose a couple of hp, which I might not notice :laughing6:
Thomas
Unfortunatly our "non premium" fuels are 91 octane.

nvrau, petrol is like wine and many other things. You get what you pay for. The more expensive fuels are better for your car, no matter if it is a clapped out Ssanyong or E63 wagon. Apart from the octane rateing they includes fancy stuff that actually does clean your engine. As i have posted many times before I have seen so many cases of this in our workshop. Pull down an engine that has run on premium fuels and good oil changes and the insides are a nice honey yellow colour. Pull down and engine that has run on nothing but standard unleaded and the insides are coated with a black sooty deposit. Some even look like an old diesel.
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T-Modell
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Re: Moving to Premium Unleaded Car

Post by T-Modell » Wed 10 Oct, 2018 10:15 pm

Hi John,

I wasn't aware that "non-premium" is 91. We have 91 here (normal), 95 (Super), 98 (Super Plus) and the 100/102 Shell etc. super fuel, that costs a ridiculous price.

Regards
Thomas

P. S.: I wouldn't drive my car with 91, although it is possible. But 95/98: I didn't notice anything.
---------------------------------------------------------------
1967 W111 250SE Cabriolet, horizon blue
1973 W115 220D 5.0 Pick-Up Argentina, work in progress 2017/18/19
1986 R107 500SL, arctic white, the midlife crisis viagra replacement
2007 R171 SLK350, calcit white
2008 S211 E63T, calcit white, sleeper

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Ivanerrol
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Re: Moving to Premium Unleaded Car

Post by Ivanerrol » Wed 10 Oct, 2018 10:39 pm

Thomas, the difference in price between 95 and 98 octane in Australia is too small to differentiate.
As John has mentioned the benefit of the 98 blend with the added ingredients is too hard not to ignore.
All of our 98 is imported.
Europe gets much higher quality fuels than are available in Australia. Up until recently Australian Diesel fuel was substandard - only fit for trucks and old Merc's which were made for low quality stuff. Australian diesel fuel is still not up to Euro standard.
The Ethanol blend is all over the place. It's supposed to be 10% but in reality what comes out at the pump :dontknow:
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nvrau
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Re: Moving to Premium Unleaded Car

Post by nvrau » Thu 11 Oct, 2018 4:19 pm

Thanks for the feedback everyone!

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