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What type of motor oil should be used in a 1994 Pontiac Firebird Formula what is the suggested weight and regular or synthetic used?

The recommended engine oil for the 1994 Pontiac Firebird Formula varies depending on the engine type and specific owner's manual specifications. Here's the general recommendation:

1. 5.7-liter V8 LT1 Engine:

- SAE 10W-30 motor oil is recommended for temperatures above 0°F (-18°C).

- SAE 5W-30 motor oil is recommended for temperatures below 0°F (-18°C).

- You can use either conventional (regular) or synthetic oil, based on your preference and driving conditions. Synthetic oil provides better performance and durability, while conventional oil is more affordable.

2. 6.5-liter V8 High Output Engine (WS6):

- SAE 5W-30 synthetic motor oil is specifically recommended for the 6.5-liter WS6 engine.

Always refer to your vehicle's owner's manual for the exact oil specifications, as recommendations may vary based on specific models and trim levels.