Redex

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johnz3
Joined: Wed 13 Sep, 2006 11:27
Posts: 670

  Z3 roadster 3.0i
Location: Pitsea

Redex

Post by johnz3 » Fri 26 Jun, 2015 06:53

Just watched a Fifth Gear programme where they went through some increased performance enhancements. One of those was the use of Redex. Not worried about power improvements, more the cleaning of the fuel system. Anyone used it and can recommend it please. Also what happens to the 'muck' after the system is cleaned.

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Southernboy
Joined: Thu 07 Oct, 2010 13:39
Posts: 6312

  Z3 roadster 3.0i
Location: Johannesburg

Re: Redex

Post by Southernboy » Fri 26 Jun, 2015 07:18

.......... Oil change might be the logical solution after use ?
Although many fuels are advertised as containing additives which "keep the engine clean". In support of those claims, I removed my intake manifold from my 2.8 a few years back, and looking into the intake ports on the cylinder head, the valves and stems, and the general interior there was all like bright new metal. I habitually use Caltex premium which claims to contain "CX3" - That additive is supposed to keep the engine clean. Maybe it does, or maybe that area of the cylinder head is always clean if all seals etc are "normal"...
Redex was a very popular additive when fuels still had lead added... it was claimed to lube valves etc and prevent them sticking etc... I recall seeing mechanics tossing it into the top of carburetors when I was a kid, and the exhaust would billow clouds of white smoke as it was burnt in the cylinders. :wink:
"Normal is overrated"
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johnz3
Joined: Wed 13 Sep, 2006 11:27
Posts: 670

  Z3 roadster 3.0i
Location: Pitsea

Re: Redex

Post by johnz3 » Fri 26 Jun, 2015 07:54

Cheers. Worth a £5 so will give it a try.

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Southernboy
Joined: Thu 07 Oct, 2010 13:39
Posts: 6312

  Z3 roadster 3.0i
Location: Johannesburg

Re: Redex

Post by Southernboy » Fri 26 Jun, 2015 08:23

Let us know what the outcome is if anything noticeable.. :wink:
"Normal is overrated"
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MarkAP68
Joined: Sat 03 May, 2014 22:32
Posts: 42

  Z3 roadster 1.9
Location: Swadlincote

Re: Redex

Post by MarkAP68 » Fri 26 Jun, 2015 17:25

I use STP in my cars as used redex 20 years ago and found STP much better.

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TomH84
Joined: Sun 15 Dec, 2013 15:22
Posts: 110

  Z3 roadster 2.2i

Re: Redex

Post by TomH84 » Fri 26 Jun, 2015 18:54

x2 on just changing your oil regularly and keeping on top of servicing (air filter/ plugs etc). And use only high quality branded super-unleaded - it's full of detergents, plus you get improved performance guaranteed by BMW (the z3 ECU remaps for 98 octane fuel) = zoom zoom.
2002 BMW Z3 2.2i 82k
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Zedona
Joined: Tue 11 Aug, 2009 15:44
Posts: 135

  Z4 roadster 3.0si
Location: Meopham

Re: Redex

Post by Zedona » Sat 27 Jun, 2015 12:53

I saw that edition of Fifth Gear and they tried to regain original power output from an older car.
Everything tried was then tested on a rolling road to determine power at the wheels. The only
significant increase in power was after a Redex treatment, about 4.5 BHP as I recall. All other
things tried resulted in minor improvements. As for other treatments only a similar test would
be worth while, an increase of 4 BHP isn't really noticeable in driving.

johnz3
Joined: Wed 13 Sep, 2006 11:27
Posts: 670

  Z3 roadster 3.0i
Location: Pitsea

Re: Redex

Post by johnz3 » Sat 27 Jun, 2015 17:44

Yes that was the programme. Am going to try the treatment in the week.

Mugs
Joined: Wed 07 Aug, 2013 02:26
Posts: 341

  Z3 roadster 1.9

Re: Redex

Post by Mugs » Sat 27 Jun, 2015 20:02

TomH84 wrote:x2 on just changing your oil regularly and keeping on top of servicing (air filter/ plugs etc). And use only high quality branded super-unleaded - it's full of detergents, plus you get improved performance guaranteed by BMW (the z3 ECU remaps for 98 octane fuel) = zoom zoom.
+1
i have been using Shell v power nitro+ in the zed for about 3 months and every time i drive it it feels better, smoother and a little faster so it must be doing some good by cleaning out 18 years of gunk from the system.

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sirius-c
Joined: Wed 12 Dec, 2012 22:24
Posts: 489

  Z3 roadster 2.8
Location: Eeh ba gum lad, 'ow do?

Re: Redex

Post by sirius-c » Wed 12 Aug, 2015 16:19

I've used stp and redex in my z3 for the past 3 years.....
I recomend you save the money that you were going to purchase these snake oils with, then when you accumulate £126 have a terra clean done.
I had my 1997 2.8 auto (60k on the clock) cleaned a couple of months ago .....I constantly saw 17 to 19mpg but i do like driving foot to the floor with the "daft boy mode" button on the auto box engaged quite often, after my last three fill ups I've been averaging 23mpg with the same style of driving. Ive yet to drive grandpa style and see what the mpg is.

Like others have said, high quality super like shell v-power nitro contains detergents anyway, so in my opinion, the snake oil is a waste of money and the terra clean has definitely done something good
1997 2.8L Z3 Roadster

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Vic-Z3
Joined: Fri 11 Jun, 2010 20:28
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  Z3 roadster 2.2i
Location: Redditch
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Re: Redex

Post by Vic-Z3 » Wed 12 Aug, 2015 21:18

Tesco's quite often have it at half price, which is when I purchase mine for £1.98.
I have used it in many of my vehicles, it certainly has done them no harm and from
reports published seems to do some good.
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Southernboy
Joined: Thu 07 Oct, 2010 13:39
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  Z3 roadster 3.0i
Location: Johannesburg

Re: Redex

Post by Southernboy » Thu 13 Aug, 2015 09:55

5th gear Youtube video link - Redex seems to be quite impressive !
https://www.youtube.com/watch?v=03nL8Z0dRkI
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