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Author Topic: Does my car really need super premium 95/97 RON petrol?  (Read 1868 times)

Offline Tobias Rideout

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Does my car really need super premium 95/97 RON petrol?
« on: April 10, 2017, 08:40:38 pm »
can the vr6 engine run ok with normal petrol. handbook says that I should use super premium/95/97 ron high octaine. is there any long term problems using normal petrol?
T.RIDEOUT

Offline insanitybeard

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #1 on: April 10, 2017, 08:51:29 pm »
I thought regular unleaded was 95 RON, it's the premium stuff that's 97.
Always learning..... Often by mistakes!

Offline Ben g mon

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #2 on: April 10, 2017, 09:01:49 pm »
I had a vw engined seat Toledo and it was more "urgent" on the 97 RON super unleaded...

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #3 on: April 11, 2017, 11:27:36 am »
but does it use more fuel? :'(
T.RIDEOUT

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #4 on: April 11, 2017, 11:30:28 am »
I thought regular unleaded was 95 RON, it's the premium stuff that's 97.
yeah your right my mistake
T.RIDEOUT

Offline insanitybeard

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #5 on: April 11, 2017, 11:37:13 am »
I doubt the engine would be any less fuel 'efficient' LOL on the high octane stuff, it's supposed to improve MPG if anything but the extra cost of the stuff over the standard unleaded will more than offset any saving!
Always learning..... Often by mistakes!

Offline Ben g mon

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #6 on: April 11, 2017, 07:52:08 pm »
Start with the fuel light on then Put in 15 litres say worth of regular 95 Ron regular unleaded, reset trip mile counter on dash  drive normally until used up. Make note of how many miles done
When the fuel light comes on Then fill up with 15 litres of super dooper Unleaded 97 Ron again reset trip mile counter and drive normally until fuel light on and compare the two.

I preferred the 97 Ron petrol as it went like a rocket.....

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #7 on: April 13, 2017, 10:58:49 am »
can you mix them both or do you need to wait till the tank is empty? years ago I had a old 94 astra and I think as far as I can remember there was a engine switch for different RON petrol types, is there anything on these engines that you have to do?
T.RIDEOUT

Offline johnnyroper

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #8 on: April 13, 2017, 01:48:17 pm »
It's fine to mix it.

The old fuel injected Vauxhall used to have a ron plug under bonnet for use in deifferent countries as fuel grades varied.

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #9 on: April 14, 2017, 01:46:08 pm »
ok thanks mate, I want to do a oil change! is it ok to use holts engine flush on these engines?
T.RIDEOUT

Offline johnnyroper

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #10 on: April 14, 2017, 01:52:30 pm »
Purely personal choice but I don't use engine flush I just get oil nice and warm and drain it down leaving sump plug out while I change the filter so dump totally empty. Then refillwith fresh PD oil of decent quality.

Offline insanitybeard

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #11 on: April 17, 2017, 11:22:48 am »
Looks like the VR6 motor still uses 5/40 grade oil as the PD's do, but it won't necessarily need to be PD spec oil (505.01) for the V6 petrol.
Always learning..... Often by mistakes!

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #12 on: April 17, 2017, 12:55:58 pm »
could I use 5w30 oil or do I need to stick to 5w40
T.RIDEOUT

Offline insanitybeard

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #13 on: April 18, 2017, 11:19:45 am »
I know some of the PD diesel engines (and presumably numerous other VW engines which have a choice of standard fixed interval or 'longlife' service schedules) specified with 5/40 oil for fixed (e.g, 10k) service intervals are specified with 5/30 oil for 'longlife servicing', but unless the 2.8 VR6 engine ever had the same 'dual spec' servicing schedule ever applied to it (which I don't think it did), personally I'd stick to the recommended grade.
Always learning..... Often by mistakes!

Offline Tobias Rideout

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Re: Does my car really need super premium 95/97 RON petrol?
« Reply #14 on: April 18, 2017, 11:46:29 am »
ok cheers mate. :)
T.RIDEOUT

 

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