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Conquest pre selector gearbox oil
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- Wise Man
- Posts: 847
- Joined: Sat Feb 13, 2016 1:25 pm
- Location: Worcestershire Herefordshire border
Conquest pre selector gearbox oil
I know this has been covered before but I couldn't find it using the search facility. Time for an oil change so do I need a straight 30 grade or will a 20/50 be ok? Just thinking of any possible implications of anti-friction additives on the fourth gear 'clutch'.
Last edited by Phillmore on Wed Jan 17, 2018 8:41 am, edited 1 time in total.
Andy
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
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- Wise Man
- Posts: 503
- Joined: Thu Mar 10, 2016 10:02 pm
- Location: Sydney, Australia
Re: Conquest pre selector gearbox oil
Hi Andy,
Straight 30 if you can, the same for the engine and also the fluid flywheel.
Cheers
Peter Grant
Straight 30 if you can, the same for the engine and also the fluid flywheel.
Cheers
Peter Grant
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- Posts: 256
- Joined: Wed Feb 10, 2016 9:15 pm
- Location: Victoria, Australia
Re: Conquest pre selector gearbox oil
Penrite do a GB30 straight 30 grade; it's the only way to go for the gearbox and FF.Penrite 20w50 or Shelsley Light for the engine oil.
Cheers
Michael
Cheers
Michael
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- Wise Man
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- Location: Penkridge. Staffs.
Re: Conquest pre selector gearbox oil
Use only a straight 30 grade in the gearbox as anything other might induce slipping bands, same in the flywheel - as a thinner viscosity could well incease coupling speed- although a multigrade would be fine in the engine.
Shop around on cost (try Silkolene or Halfords etc for the straight 30) as some oils just command a fancy price.
Shop around on cost (try Silkolene or Halfords etc for the straight 30) as some oils just command a fancy price.
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- Posts: 154
- Joined: Fri Feb 12, 2016 10:25 pm
- Location: Cheshire, UK
Re: Conquest pre selector gearbox oil
I`m not sure that Halfords do a straight 30 - I have a feeling that all their stuff is multigrade. However, I do know that Machine Mart do one - it`s that that`s in my fluid flywheel and gearbox.
Cheers
Terry
Cheers
Terry
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- Wise Man
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- Location: Worcestershire Herefordshire border
Re: Conquest pre selector gearbox oil
Thanks all. I visited my local classic car oil supplier today (Holden's of Bromyard) and they have just stopped stocking Penrite oils due to import costs which is a shame as the GB30 sounded ideal and I use their Classic Light 20/60 for the engines. So that leaves Millers, Morris's or Castrol? I suppose ideally the straight 30 needs as few additives as possible to prevent any slipping.
Andy
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
- theoldman
- Extremely Wise Man
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- Joined: Mon Feb 08, 2016 2:39 pm
- Location: Bacton on Sea, Norfolk UK
Re: Conquest pre selector gearbox oil
Andy,
Your local agricultural merchant will be a favourite source of 30 grade.
Buy the cheapest you can get!!
Neil
Your local agricultural merchant will be a favourite source of 30 grade.
Buy the cheapest you can get!!
Neil
Normal for Norfolk
- marchesmark
- Helpful Person
- Posts: 471
- Joined: Tue Feb 09, 2016 8:02 pm
Re: Conquest pre selector gearbox oil
I use Penrite Oils as well, I get them from Classic Oils:
https://www.classic-oils.net/All-Produc ... r/Penrite/
Mark
https://www.classic-oils.net/All-Produc ... r/Penrite/
Mark
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- Wise Man
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- Location: Worcestershire Herefordshire border
Re: Conquest pre selector gearbox oil
Do you know what their carriage costs are Mark? I've been on the Penrite website and found another stockist near Droitwich (20 miles awayish) so awaiting reply to my email. Surprise of the day is that Penrite GB30 gearbox oil is actually a 20/60 multigrade although they do say it is suitable for epicyclic gearboxes.
Andy
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
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- Wise Man
- Posts: 847
- Joined: Sat Feb 13, 2016 1:25 pm
- Location: Worcestershire Herefordshire border
Re: Conquest pre selector gearbox oil
I hadn't thought of ag suppliers Neil I'll give it a try.
Andy
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster
1954 Conquest Mk1, 1956 Conquest Mk2, 1957 Conquest Century Mk2, 1955 Austin A90 Westminster