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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#41
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Engine Oil top ups (thing of the past maybe?)
In article ,
wrote: Even a child who has played with a Meccano set would know there is more load on the cam of a pushrod engine than an OHC design. It is so blindingly obvious it takes a real fool to dispute it. Yes. The question is whether it's significant. Then do some Googling on the subject of oils and pushrod engines. Even you should manage that. -- *If you try to fail and succeed, which have you done? * Dave Plowman London SW To e-mail, change noise into sound. |
#42
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Engine Oil top ups (thing of the past maybe?)
On Sun, 26 Jul 2020 08:45:11 +0100, Brian Gaff \(Sofa\) wrote:
My dads old Hillman Minx ended up using almost as much oil as petrol! Brian I had a Rover 105R with a crankshaft seal leaking, so I always parked it over a drain. |
#44
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Engine Oil top ups (thing of the past maybe?)
In article ,
"Dave Plowman (News)" wrote: I was merely trying to explain why is is a good idea to use the correct oil for your engine - regardless of age. But if you by a banger and throw it away every year, it doesn't much matter. Thanks Dave - fair point. We have no intention of throwing away our bottom of the range, 10yrs old, 4000m per year Panda, and so next time I change the oil I'll make sure I treat it to 3.8 litres of unmixed Right Stuff :-) BTW, on the subject of engineers: we used to have someone here from "Puma Racing" (I think he was called Dave as well) -- his opinions would have been useful in this mix! Cheers John |
#45
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Engine Oil top ups (thing of the past maybe?)
On 27/07/2020 07:38, Thomas Prufer wrote:
On Sun, 26 Jul 2020 13:48:44 +0100, Another John wrote: Cheapest was a synthetic oil. I asked the lad there (an about-40 yrs old lad, spent all his working life in the motor factors, and engines) about mixing this with the oil I'd got: he said "doesn't matter - just shove it in, as long as it's the right viscosity". ISTR: there was once a time where the different additives in engine oils could be incompatible, and cause it to gel or thicken. Along came the military, and mandated that all oils be mixable without (drastic) downsides. (I tried to find my source, but google groups seem more broken than usual, returning 0 hits for "motor oil mix"...) Thomas Prufer Some time ago now. I'm not sure whether it was driven by the military, or the motor industry, or just the oil industry getting its act together (given the reputational loss if one was rumoured to be making an incompatible oil). My understanding is that all motor oils are either mineral, or semi synth, or fully synthetic. Synthetics are all group IV, polyalphaolefins, i.e hydrocarbons and therefore safely miscible with mineral oils. Having all the base oils compatible means it makes sense having compatible additives across the brands. If you need higher performance, e.g. military jets, high performance compressors, you use Group V base oils which include phosphate esters and poly alkylene glycols. You *do* have to avoid mixing these with other commercial mineral oils. I'm not sure how much this is down to incompatibilities of the base oils or incompatibilities of the additives. |
#46
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Engine Oil top ups (thing of the past maybe?)
Another John wrote:
In article , "Dave Plowman (News)" wrote: I was merely trying to explain why is is a good idea to use the correct oil for your engine - regardless of age. But if you by a banger and throw it away every year, it doesn't much matter. Thanks Dave - fair point. We have no intention of throwing away our bottom of the range, 10yrs old, 4000m per year Panda, and so next time I change the oil I'll make sure I treat it to 3.8 litres of unmixed Right Stuff :-) BTW, on the subject of engineers: we used to have someone here from "Puma Racing" (I think he was called Dave as well) -- his opinions would have been useful in this mix! Dave Baker I believe. Doesnt post much on Usenet these days. I did see one from him on uk.rec.cars.maintenance some months ago. Tim -- Please don't feed the trolls |
#47
Posted to uk.d-i-y
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Engine Oil top ups (thing of the past maybe?)
In article ,
Another John wrote: BTW, on the subject of engineers: we used to have someone here from "Puma Racing" (I think he was called Dave as well) -- his opinions would have been useful in this mix! Yes - Dave Baker. A true expert I learned a lot from. And a very nice man. -- *Gun Control: Use both hands. Dave Plowman London SW To e-mail, change noise into sound. |
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