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Post by Paul Dawkins on Aug 6, 2012 17:53:27 GMT 1
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Post by steelerd on Jan 6, 2013 2:35:24 GMT 1
Paul Mega help nice one mate
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Post by kitkatjeff on Jan 7, 2013 20:56:32 GMT 1
very usefull, have the usual corrosion in my 31k petrol tank so although i am running it with the autolube this will be a usefull reference guide
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Post by huggy76 on Apr 29, 2013 19:21:20 GMT 1
Very helpful, i can never figure this out.
Sad but more for garden strimmer than RD.
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paulh
L plate rider.
Posts: 38
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Post by paulh on Jun 10, 2013 19:42:10 GMT 1
My Mrs made me a few laminated ones up as she was getting peed off with me always asking her to work it out - Split them amongst my various tool boxes so can usually find one lying about.
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Post by copper99 on Jun 14, 2013 21:09:45 GMT 1
What would be the ratio for a standard 4L0 then chaps?
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Post by steve h on Jun 14, 2013 22:29:06 GMT 1
Ask 10 people and get 10 different answers. I raced on 35 to 1.
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Post by Norbo on Jul 1, 2013 6:21:38 GMT 1
According to the chart I run around the 25 or 30 to 1
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Post by commando on Sept 3, 2013 0:55:29 GMT 1
hi im new to lcs would that be fully synthetic or semi synth
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Post by daveo on Sept 20, 2013 20:40:15 GMT 1
hi im new to lcs would that be fully synthetic or semi synth See the answer from steveh. I don't know if the oil type has a bearing on the optimum ratio, probably will a bit but I bet no one has figured it out. Just use good stuff from a brand you recognise.
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Post by guiri on Oct 24, 2013 12:47:11 GMT 1
sound nice chart to have, so i dont need to swtich my brain on...
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Post by tigtaylor on Nov 18, 2013 22:48:12 GMT 1
Thanks very usefull info cant believe im 50 and i still cant work it out ...duh
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higgsy
Thrash Merchant
Posts: 458
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Post by higgsy on Nov 20, 2013 21:32:11 GMT 1
Is that US gallons? I run 166ml to five liters of fuel, works out at 30-1. Oil? Oh blimey that's a can of worms as SteveH said lol
I premix Castrol XR77, top stuff for racing but it's foooking expensive, i would have thought power 1 or similar would be good for road use
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Post by chrissmiff on Dec 18, 2013 18:25:37 GMT 1
just printed out very usefull cheers
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brads
Weekend rider
Posts: 53
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Post by brads on Jan 15, 2014 15:32:15 GMT 1
Very useful. Just printed it and I'm thinking of laminating it...
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Post by thumper on Jan 22, 2014 4:36:31 GMT 1
Is that US gallons? I run 166ml to five liters of fuel, works out at 30-1. Oil? Oh blimey that's a can of worms as SteveH said lol I premix Castrol XR77, top stuff for racing but it's foooking expensive, i would have thought power 1 or similar would be good for road use It is indeed US gallons not english, for litres try this working on line calculator www.haniel.co.uk/fuelmixcalc.html
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Post by pepsisteve on May 14, 2015 21:47:53 GMT 1
I always do 25ml of oil per litre of fuel, it's what Gerry pell told me to do
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Feb 23, 2016 23:06:26 GMT 1
It's easy if you start with the volume of oil first and buy the volume of fuel to match
25 : 1 1000cc oil = 25 litres petrol 500cc oil = 12.5 litres petrol 100cc oil = 2.5 litres petrol
30: 1
1000cc oil = 30 litres petrol 500cc oil = 15 litres petrol 100cc oil = 3 litres petrol
35 : 1
1000cc oil = 35 litres petrol 100cc oil = 3.5 litres petrol
40 : 1
1000cc oil = 40 litres petrol 100cc oil = 4 litres petrol
etc. etc.
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Post by doohanno1 on Apr 6, 2016 23:46:30 GMT 1
So back in the day i ran 40;1 on Castrol 747.. Most small petrol cans are 5 litres.. 40-: 5 = 8 1000 -: 8 = 125 ml of 2T
And then I left my brain in the toolbox..
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Post by arrow on Apr 7, 2016 0:51:32 GMT 1
So back in the day i ran 40;1 on Castrol 747.. Most small petrol cans are 5 litres.. 40-: 5 = 8 1000 -: 8 = 1.25 ml of 2T And then I left my brain in the toolbox.. Why didn't you just do 5000÷40 ??
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Post by stusco on Apr 7, 2016 7:40:09 GMT 1
I thought it would be 5000 divided by 41(the 40 parts petrol plus the 1 part oil)
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Post by steven on Apr 7, 2016 7:58:34 GMT 1
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Post by doohanno1 on Apr 7, 2016 22:16:36 GMT 1
So back in the day i ran 40;1 on Castrol 747.. Most small petrol cans are 5 litres.. 40-: 5 = 8 1000 -: 8 = 125 ml of 2T And then I left my brain in the toolbox.. Why didn't you just do 5000÷40 ?? I love to complicate things..
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Post by arrow on Apr 7, 2016 23:07:56 GMT 1
I thought it would be 5000 divided by 41(the 40 parts petrol plus the 1 part oil) The 1 is not there when you make the calculation. It's splitting hairs anyway. If it is 41 then this gives less oil. The other way is safer.
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Post by stinkwheels44 on May 20, 2016 11:43:07 GMT 1
Just got the app seems great. Now to clean the oil off my phone
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Post by Athers on May 26, 2016 9:22:13 GMT 1
Great very usefull LC and the strimmers
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Post by cndhighlander on May 30, 2016 5:50:04 GMT 1
An Elise tank holds 16 litres of petrol. If you put 500 mls in a full tank it will be a ratio of 32:1 using iPone two stroke motor oil.
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Post by bare on Jun 18, 2016 3:16:36 GMT 1
Erm I find it Easier if one uses %'s rather than ratios. 5% was proven good for early 70's TZ's. Remember: it's Only too much oil.. when the plugs foul.
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Post by alistair64 on Sept 2, 2016 8:43:29 GMT 1
Erm I find it Easier if one uses %'s rather than ratios. 5% was proven good for early 70's TZ's. Remember: it's Only too much oil.. when the plugs foul. Isn't it a fine balance between robbing the engine of power (too much oil) and seizing it (too little)? The most power is to be gained by actually using less oil (so I've read), but obviously there is a huge risk involved for road use unless you have very deep pockets and bags of free time!
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Post by stusco on Feb 21, 2018 18:44:05 GMT 1
I thought it would be 5000 divided by 41(the 40 parts petrol plus the 1 part oil) The larger number refers to the amount or "parts" of petrol. The smaller number (usually 1) is the amount or "parts" of oil you will mix into it. So... 40 : 1 is the same as saying 40L : 1L If you were to buy 40 litres of petrol you would need to add 1 litre of oil to it for a 40:1 ratio To help you with the mental arithmetic... You can divide each side by half until you get sensible numbers (so the amount you buy will actually fit into you fuel tank / can) 40:1 = 20:0.5 = 10:0.25 = 5:0.125 = 2.5:0.0625(L) - 0.0625 of a Litre is 625ml (just times by 1000) Or another way is to first convert all the numbers from Litres to Mililitres by adding THREE zeros to each side like this... 40000:1000 = 20000:500 = 10000:250 = 5000:125 = 2500:62.5(ml) so 10000ml (10L) of fuel needs 125ml oil and if you knock a zero off, for much smaller amounts you might want to mix... 4000:100 = 2000:50 = 1000:25 = 500:12.5 = 250:6.25(ml) so 250ml fuel needs just 6.25ml (six and a quarter mililitres)
basically its just a case of picking the units you are using first, then divide each side by have till you get to the amount of fuel / oil you are actually using - no need for a calculator, but if you want to check your answer if you get confused by all the "0." stuff, just times by 1000 and it should look right e.g. 0.125x1000=125(ml)
See? Clear as mud.
Just fit a pump save the grief
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