Volkswagen Beetle 1972 Owner's Manual page 80

Remember, from 6,000 miles onward, the VW Diagnosis and
Maintenance service should be performed every 6.000 miles.
Engine oil should be changed every 3.000 miles.
If your Volkswagen is driven less than 3,000 miles in three
months, have the oil changed every three months; if driven
less than 6,000 miles in twelve months, have the front end
lubricated once a year (VW 111 only).
Of course, you can obtain a VW Diagnosis at any time — out-
side the regular schedule — at your Authorized Volkswagen
Dealer. Especially if you drive less than 6,000 miles a year,
we recommend you have a VW Diagnosis performed between
regular mileage intervals.
To get you started, there is a booklet with VW Diagnosis
Coupons in the back cover pocket of this manual.
The first of these coupons entitles you to a free maintenance
and oil change service. The next four coupons enable you to
obtain one free VW Diagnosis each. The remaining coupons
serve as a reminder to bring your Volkswagen in for a VW
Diagnosis and Maintenance at regular intervals.
The free coupons are not transferrable; the are only valid for
your Volkswagen. Do not remove them from the coupon
booklet which shows the chassis number of your car.
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