Engine; Engine Oil Drain Period; Favourable; Average - Triumph TR3 Instruction Book

Draining
To drain the engine, gearbox and rear axle, remove the plug provided
beneath each unit. This process is assisted by opening the filler to allow
ingress of air and by draining when the oil is hot, i.e., immediately after
a run.
Only first quality oils are recommended for use in the engine sump. These are
of correct viscosity and character to afford complete lubrication protection
for normal driving. Additives which dilute the oil or otherwise impair this
protection must not be used.

Engine Oil Drain Period

The frequency of the drain period should be related to the driving conditions
to which the vehicle is subjected. 3,000 mile intervals are recommended for
average driving conditions as defined below.
unfavourable conditions and may be extended for those more favourable.

Favourable

Long distance journeys, with little or no engine idling, on well surfaced
roads, reasonably free from dust.

Average

Medium length journeys on well surfaced roads with a small proportion of
stop/start operation.
Unfavourable
Any of the following:
(a) Frequent stop/start driving.
Operation during cold weather, especially when appreciable
(b)
engine idling is involved.
(c) Where much driving is done under dusty conditions.
An upper cylinder lubricant may be used to advantage, during the running-
in period of a new engine. The lubricant should be mixed with the fuel in the
proportions given on the container.
advantage throughout the life of the vehicle, particularly during wintry
weather.
GENERAL UPKEEP

ENGINE

Such lubricants may be used with
1 5
This should be reduced for
SPORTS CAR