The importance of efficient lubrication cannot be over-estimated.. The use of cheap oils is false economy, and we only recommend the employment of those oils and greases which we have found from our own experience to be the most suitable for our machines.

It is specially recommended that towards the end of September the oil tank should be drained and should be refilled with one of the grades recommended for Winter use, the use of such a grade being continued throughout the Winter months. At the beginning of May the tank should again be drained out and one of the grades recommended for Summer lubrication employed.

The oil tank and pipes should be cleaned out thoroughly and the contents of the tank should not at any time be kept in use for longer than 2,000 miles running. All old oil should be discarded after this distance has been run and the tank refilled with fresh oil. Instructions for changing the oil and cleaning the filter, etc., appear on other pages.

The identifying letters used by most firms denoting the different grades under which their oils are supplied are often imitated, and it is essential when ordering oil to specify the Brand as well as the Grade. As an additional precaution see that the oil is taken from branded cabinets or from sealed tins. See also that if oil is bought " loose " that it is brought in a clean measure.

The following high-grade lubricants are recommended :-

ENGINE LUBRICATION (SUMMER).

Triple Shell (Shell Mex & B.P. Ltd.).

Essolube " 50 " (Anglo-American Oil Co., Ltd.).

Price's Motorine " C " (Price's Lubricants Ltd.).

Vacuum Mobiloil " B.B." (Vacuum Oil Co., Ltd.).

Castrol " XXL " (C. C. Wakefield & Co., Ltd.).

ENGINE LUBRICATION (WINTER).

Castrol " XL " (C. C. Wakefield & Co., Ltd.).

Double Shell (Shell Mex & B.P. Ltd.).

Essolube " 40 "(Anglo-Amercian Oil Co., Ltd.).

Price's Motorine " M " (Price's Lubricants Ltd.).

Vacuum Mobiloil "A" (Vacuum Oil Co., Ltd.).

FOR COMPETITION MACHINES the following are recommended for engine lubrication :—

Vacuum Mobiloil " D " (Vacuum Oil Co., Ltd.).

Castro! " Grand Prix " (C. C. Wakefield & Co., Ltd.).

Golden Shell (Shell Mex & B.P. Ltd.).

Essolube " Racer " (Anglo-American Oil Co., Ltd.).

Price's Motorine " B de Luxe " (Price's Lubricants Ltd.).

GEAR BOX LUBRICATION.

Use Summer Grade Engine Oil throughout.

HUB LUBRICATION.

Price's Belmoline " C " (Price's Lubricants Ltd.).

Mobilgrease No. 4 (Vacuum Oil Co., Ltd.).

Castrolease Heavy (C. C. Wakefield & Co., Ltd.).

Shell Retinax C.D. (Shell Mex & B.P. Ltd.).

Esso Grease (Anglo-American Oil Co., Ltd.).

FOR GREASE NIPPLES.

Esso Grease (Anglo-American Oil Co., Ltd.).

Price's Belmoline " C " (Price's Lubricants Ltd.).

Mobilgrease No. 2 (Vacuum Oil Co., Ltd.).

Castrolease Medium (C. C. Wakefield & Co., Ltd.

Shell Retinax C.D. (Shell Mex & B.P. Ltd.).

FOR REAR CHAINS.

Shell Retinax C.D. (Shell Mex & B.P. Ltd.).

Esso Grease (Anglo-American Oil Co., Ltd.).

Price's Rangraphine (Price's Lubricants Ltd.).

Mobilgrease No. 2 " (Vacuum Oil Co., Ltd.).

Castrolease" G " (C. C. Wakefield & Co., Ltd.).