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Yes, summer weight oil can get too thick in the cold and prevent the engine from turning over fast enough to start. This is a big problem in many diesel cars and trucks.

The question simply doesn't have enough information; but after all it is being asked in AUGUST so I seriously doubt thick oil is your actual problem. If the engine turns over too slowly to start, check out the starting circuit - battery, cables, starter solenoid, starter - and you'll probably find the problem (if slow cranking is the issue). Alternately, it depends on how the problem began (slow cranking). Could be a bearing almost seized up or some component in the serpentine belt drive that is already seized up (release tension on the belt to determine if that is the problem by releasing the idler (tensioner) pulley and dropping the belt loose before cranking. GOOD LUCK.

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14y ago

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