what engine oil to use
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  1. #1
    sparky
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    what engine oil to use

    hi all, can sum one tell me whats the best oil to use in a 283 sbc? ive been told to use 10/40 by one guy and 15/30 by another?? i went with the 15/30 but the engine takes a while to fire up when cold even when the choke is used, splutering, cuttin out etc till warm

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    Carburation 'sucks' Roscobbc's Avatar
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    Quote Originally Posted by sparky View Post
    hi all, can sum one tell me whats the best oil to use in a 283 sbc? ive been told to use 10/40 by one guy and 15/30 by another?? i went with the 15/30 but the engine takes a while to fire up when cold even when the choke is used, splutering, cuttin out etc till warm
    Millers Classic 20-50 Mineral @ around £20 for 5 ltrs - has ZDDP additive for older flat tappet engines.

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    Official RnS Addict v8ian's Avatar
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    Deffo 20/50. Mineral oil or if the engine is well run in you can use 20/50 semi or full synthetic, Syn in a fresh engine with older style rings and pistons and non treated bores will glaze up double quick,
    Remember, the engine design you are using is heading for 60 years old!! the designs of oil pump and tollerances the engine is built to is nowhere near as precise as a modern engine, so the oil generally needs to be thicker, as such the engine design , same as Ford and Rover all are High Volume systems, and not high pressure systems

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    Exceeded sell by date Plumpcars's Avatar
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    As said above you need a 20/50.
    I use Penrite HPR30 which is a little dearer and harder to get but a quality oil.Seems to hold pressure better when warm.

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    Off the Xmas card list kapri's Avatar
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    Check this old thread out, you need to make sure the oil is for older engines due to the requirement for higher ZDDP to allow for metal to metal contact in older flat tappet cams. VERY important if breaking in a new 'old' engine.This is removed from newer oils as it damages catalytic converters.

    https://www.rodsnsods.co.uk/forum/sho...highlight=zddp


    ZDDP supplement is realily available from Burton Power as ZDDPlus.

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    Carburation 'sucks' Roscobbc's Avatar
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    http://forums.corvetteforum.com/c3-t...ppet-oils.html

    Take a look at this link - things do get confusing! - very few few oil companies give specific ZDDP info - even the ZDDP additive mentioned at Burtons doesn't actually state what the percentage or ppm will be when oil is treated. Bottom line is that very few oils avaialable over the counter at your local car spares shop will have the additive. Even the ones that supposedly have it won't state the constituant parts. On the link above independant test houses have refuted manufacturers claims (like Valvoline VR1 mineral having less than half maker 1800 ppm!)

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    I am with the dark side.. PeteF's Avatar
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    Millers 20/50 is very good, old school oil for an old school engine design. Makes sense to me. Just paid £21 for 5lts in Portsmouth.

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    Off the Xmas card list kapri's Avatar
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    Where did you find that in Portsmouth Pete ?

    I normally go with Halfords Classic oil , if it isn't Duckhams in a different tin I'll eat my hat !.I did a lot of research re what spec to use and whilst the cheap end of the market Comma / Morris mark their cans that they are that spec I'm suspect of them.


    Rob, when you treat with ZDDPlus the oil feels very different when rubbed between the fingers .Personally I'd rather run the rsk of having too much compared with too little

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    Carburation 'sucks' Roscobbc's Avatar
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    Quote Originally Posted by kapri View Post
    Where did you find that in Portsmouth Pete ?

    I normally go with Halfords Classic oil , if it isn't Duckhams in a different tin I'll eat my hat !.I did a lot of research re what spec to use and whilst the cheap end of the market Comma / Morris mark their cans that they are that spec I'm suspect of them.


    Rob, when you treat with ZDDPlus the oil feels very different when rubbed between the fingers .Personally I'd rather run the rsk of having too much compared with too little
    I think that there is some evidence that too much ZDDP actually has a detrimental effect - you would need to do a detailed search on-line to find this info though.

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    Off the Xmas card list kapri's Avatar
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    Yup, I've seen that Rob but my thinking is that too low will definitely wipe your cam Bit like the failed brakes scenario, tail end the motor in front or scoot round the outside and take your chances ( one more than one occasion real world )

    I seem to remember that the ZDDPlus told you on the bottle what the ppm would be if added to a gallon of oil? I haven't any empty ones around here at the mo. I'll check up at Antons unit when I go up next.
    Last edited by kapri; 18-12-2009 at 14:17.

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