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Old 05-15-2013, 01:24 PM   #1
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1990 5.0 oil

Can you really tell the difference between regular oil and synthetic? If so is royal purple a good oil to put in my mustang

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Old 05-15-2013, 01:36 PM   #2
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Not much of a difference ! Just that you can wait longer to get a oil change ! But royal purple is better for engine ! Mobil 1 is good to.

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Old 05-15-2013, 02:06 PM   #3
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Depends on many factors. Conventional oil has come a long way from just 20 years ago. Synthetic is better as mentioned, just be careful because the detergents can really clean the gunk out enough that old gaskets can begin to leak. Just ask my oil pan.
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Old 05-15-2013, 02:28 PM   #4
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Biggest difference in oil performance is running a different oil weight. However each engine is designed to run a certain weight oil and the weight the manufactuer recommends is the proper oil for your engine. In my experience synthetic oil does not mean longer time or distance between oil changes because the oil filter still only lasts 3000 miles reguardless of oil type. Instead using synthetic oil means longer engine life over conventional oil as the synthetic stuff does reduce friction and wear on parts but not enough to notice a performance gain for the most part. It can however help you from noticing a loss of power over time. Do yourself a favor and keep changing your oil every 3000 miles. Also with the rising cost of synthetic oils you can buy yourself a engine rebuild kit with money you save using conventional oil. With this information I leave it up to you what you wana do.
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