P Metric
With the P-Metric system, Section Width is measured in millimeters.
To convert millimeters into inches, divide by 25.4. The Aspect Ratio (Section Height divided by Section Width) helps provide more dimensional information about the tire size.
Example:

(1) P = Certain tire type used on light duty vehicles such as passenger cars
(2) Section Width in millimeters
(3) Aspect Ratio (= section height 7 section width).
(4) R = Radial Construction
(5) Rim diameter in inches
See also:
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The cruise control indicator light illuminates when the ignition switch is turned
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Engine oil
For the checking, adding and replacing procedure or other details, refer to
“Engine oil”.
NOTE
The procedure for changing the engine oil and oil filter should be performed by
a properly-trained ...
Refrigerant for your climate control system
Your air conditioner uses ozone friendly refrigerant HFC134a. Therefore, the
method of adding, changing or checking the refrigerant is different from the method
for CFC12 (freon). Consult your SUB ...
