13-09-2018, 03:33 PM
I don't know if its exactly the same as before, it has "moderate detergency" but Duckhams 20w50 is available online from here:-
https://www.duckhams.com/product/20w-50-engine-oil/
Extract from data sheet:-
GENERAL DESCRIPTION PHYSICAL CHARACTERISTICS FEATURES AND BENEFITS ALEXANDER DUCKHAM & Co TECHNICAL DATA SHEET www.duckhams.com DATE 11/17 ISSUE 01 Duckhams Classic Q 20W-50, true to its history as “the engine’s choice” and recommended in a wide range of original owners’ handbooks, is the classic, premium grade, SAE 20W-50 engine oil. Duckhams Classic Q 20W-50 features an optimal level of ZDDP (“zinc”) anti-wear capability, moderate detergency and stay-in-grade shear stability designed specifically for petrol and diesel fuelled classic vehicles manufactured between 1950 and 1989 and is also suitable for older vehicles where full-flow cartridge filters have been retrofitted. Duckhams Classic Q 20W-50 is unsurpassed in controlling oil consumption, minimising deposits and maintaining oil pressure in older engines.
Duckhams Classic Q 20W-50 is formulated to provide excellent low temperature pumpability so that the oil flows freely and minimises wear at start-up, even at very low temperatures. Protection at operating temperature is assured. For reference, Duckhams invented, and perfected, multigrade oils in Europe. Timing gear and bearing life is maximised on account of the product’s excellent performance across the engine’s full operating temperature range, from cold start to operating temperature –Duckhams Classic Q 20W-50 is truly “the engine’s choice” Through careful selection of oxidation-stable base oils and additive technology, Duckhams Classic Q 20W-50 protects from bearing corrosion and prevents sludge build-up. Duckhams Classic Q 20W-50 is formulated specifically for vehicles manufactured from 1950 – 1989 and also older vehicles where full-flow cartridge filters have been retro-fitted. Optimised ZDDP (“zinc”) level for engine component wear protection is a leading feature of Duckhams Classic Q 20W-50
https://www.duckhams.com/product/20w-50-engine-oil/
Extract from data sheet:-
GENERAL DESCRIPTION PHYSICAL CHARACTERISTICS FEATURES AND BENEFITS ALEXANDER DUCKHAM & Co TECHNICAL DATA SHEET www.duckhams.com DATE 11/17 ISSUE 01 Duckhams Classic Q 20W-50, true to its history as “the engine’s choice” and recommended in a wide range of original owners’ handbooks, is the classic, premium grade, SAE 20W-50 engine oil. Duckhams Classic Q 20W-50 features an optimal level of ZDDP (“zinc”) anti-wear capability, moderate detergency and stay-in-grade shear stability designed specifically for petrol and diesel fuelled classic vehicles manufactured between 1950 and 1989 and is also suitable for older vehicles where full-flow cartridge filters have been retrofitted. Duckhams Classic Q 20W-50 is unsurpassed in controlling oil consumption, minimising deposits and maintaining oil pressure in older engines.
Duckhams Classic Q 20W-50 is formulated to provide excellent low temperature pumpability so that the oil flows freely and minimises wear at start-up, even at very low temperatures. Protection at operating temperature is assured. For reference, Duckhams invented, and perfected, multigrade oils in Europe. Timing gear and bearing life is maximised on account of the product’s excellent performance across the engine’s full operating temperature range, from cold start to operating temperature –Duckhams Classic Q 20W-50 is truly “the engine’s choice” Through careful selection of oxidation-stable base oils and additive technology, Duckhams Classic Q 20W-50 protects from bearing corrosion and prevents sludge build-up. Duckhams Classic Q 20W-50 is formulated specifically for vehicles manufactured from 1950 – 1989 and also older vehicles where full-flow cartridge filters have been retro-fitted. Optimised ZDDP (“zinc”) level for engine component wear protection is a leading feature of Duckhams Classic Q 20W-50