MrMPuk wrote:winterheating wrote:got some oil from ford today they sell 5w-30 5w-40 and 10w-40.
Mineral oil, semi-synthetic or fully synthetic?
birdy wrote:A common problem with older design engines that have many miles of wear ,A good reason to use 15/40 semi in a Di .Been advised to use 20/50 mineral oil in my classic cars for the same reason.
winterheating wrote:birdy wrote:A common problem with older design engines that have many miles of wear ,A good reason to use 15/40 semi in a Di .Been advised to use 20/50 mineral oil in my classic cars for the same reason.
whats the reason for using mineral oil.
simplyshaker wrote:I've got 10W/40 in mine from 89, because it was cheaper. But with the temperatures going low here (-18 recently), I would like to change it to some 5W/30 to help her starting in the cold.
darkbluevanman wrote:simplyshaker wrote:I've got 10W/40 in mine from 89, because it was cheaper. But with the temperatures going low here (-18 recently), I would like to change it to some 5W/30 to help her starting in the cold.
I'd think at them temps the low crank would be because the batt was near freezing and the inlet temp was v/cold, the crank is only splashing in a bit of oil, I doubt the 5w30 is the answer to everyones prayers!... it's like diesels with glow plugs.. they are there to heat the fuel mixture at start up, when one fails it starts to moan at starting, ie the temp of the mixture is lower...
darkbluevanman wrote:simplyshaker wrote:I've got 10W/40 in mine from 89, because it was cheaper. But with the temperatures going low here (-18 recently), I would like to change it to some 5W/30 to help her starting in the cold.
I'd think at them temps the low crank would be because the batt was near freezing and the inlet temp was v/cold, the crank is only splashing in a bit of oil, I doubt the 5w30 is the answer to everyones prayers!... it's like diesels with glow plugs.. they are there to heat the fuel mixture at start up, when one fails it starts to moan at starting, ie the temp of the mixture is lower...
simplyshaker wrote:darkbluevanman wrote:simplyshaker wrote:I've got 10W/40 in mine from 89, because it was cheaper. But with the temperatures going low here (-18 recently), I would like to change it to some 5W/30 to help her starting in the cold.
I'd think at them temps the low crank would be because the batt was near freezing and the inlet temp was v/cold, the crank is only splashing in a bit of oil, I doubt the 5w30 is the answer to everyones prayers!... it's like diesels with glow plugs.. they are there to heat the fuel mixture at start up, when one fails it starts to moan at starting, ie the temp of the mixture is lower...
She's not actually a bad starter for her age, I take the battery out regularly to give it a good charge though because I use the van over short distances only most of the time. I haven't changed the oil for the 5W/30 yet (doubt I'll get round to it this winter), but I would like to see if there was a difference between the two oils at the same temperature.
the 5w oil is thinner at -temps than the 10w oil, it isnt the same viscosity, but 5w will maintain that viscosity at temps below -20 also. but as we dont really see past -20 doesnt matter, but the viscosity of the 2 oils at cold does.
Another reason why I considered putting the 5W/30 in was BECAUSE I do lots of small trips. So the thinner viscosity oil would, I imagine, circulate better, quicker.
i cant get my head round why a thinner oil wont be better full stop , cos if thicker was used engine ,it may not be protected as much from starting so therfore not as protective as a thinner oil
I find that keeping the battery in good condition, and checking the connections to the starter (keeping good contacts) is the best way to get her started in the morning !
madbri wrote:so by that chart 15/40 is good? just been given 2x5 gallons of it. hope i found a use 4 it
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