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5.0L General Discussion This section is for non-tech specific information pertaining to 5.0L Mustangs.

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Old 07-23-2007, 05:50 PM   #1
19MustangGT90
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Default castrol high milage or syntech?

which oil would be best for my mustang which has 184,000 miles?castrol high mileage or castrol syntech?
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Old 07-23-2007, 05:53 PM   #2
ZachW04Stang
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Default RE: castrol high milage or syntech?

I wouldn't run a synthetic oil in such a high milage motor. Really if you run a regular conventional oil and change it every 3000 miles or 4-5 monthes your car will be fine oil wise. You could also get shell rotilla oil which is good because it helps keep wear down in your motor from high zinc content.
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Old 07-23-2007, 05:56 PM   #3
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Default RE: castrol high milage or syntech?

Im a big fan of high mileage oils. I like them better than synthetic. They dont seem to break down very easily, and Ive seen it stop smoke out the exhaust on some cars.
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Old 07-23-2007, 06:21 PM   #4
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Default RE: castrol high milage or syntech?

I use castrol gtx high mileage, and I don't have any complaints so far.
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Old 07-23-2007, 07:37 PM   #5
91hatchgt
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Default RE: castrol high milage or syntech?

Quote:
ORIGINAL: 1985stang

I use castrol gtx high mileage, and I don't have any complaints so far.
+1 ... I have over 200k on my 94, and it doesn't burn a drop of oil.. Can't complaine. I run Royal Purple Full Synthetic in my 91. But it has a brand new engine in it.
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Old 07-23-2007, 08:29 PM   #6
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Default RE: castrol high milage or syntech?

I'm a Valvoline guy, I use the valvoline non synthetic high mileage 10w30. It's wonderful engine oil and it gets changed every 2,000-3,000 miles.
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Old 07-23-2007, 09:07 PM   #7
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Default RE: castrol high milage or syntech?

What ever oil you were using to get to 184,000 would logically be the same one to continue using....
Did 200,000 on castrol GTX on my old mill and castrol GTX on my present mill, if it worked for the first why would I switch? 10w40 (20w50 in the summer on the old mill) and 10w30 on the newfresh motor, K&N filter..same with every car I own. Never understood why people pay high dollar for oil and skimp on the filter...filtration is far more important than type IMO...as long as it's clean it's the right oil.
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Old 07-23-2007, 09:07 PM
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