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When to start using Synthetic Oils

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Old 06 Nov 2005, 10:09 pm
Young Cruiser
Join Date: Nov 2005
Location: Puyallup, WA, USA.
Posts: 53
Default When to start using Synthetic Oils

I am the new and proud owner of a 2005 limited turbo PT. It has 850 miles on it and I believe in changing oil at the 1000 mile mark to clean out any assembly oils and metal shavings that might have been left behind.
Synthetic oils are slicker and clean out crud better than other oils thus they are not as good for generating that little bit of wear you need to break in a new motor. Is the 1000 mile mark a reasonable amount of mileage to allow for break in to start using synthetics or should I make one change with petroleum oils and make the switch at 4000?

Thanks for you time in answering in advance,
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Old 06 Nov 2005, 11:06 pm
Fanatic Cruiser
Join Date: Jan 2003
Location: Rockville, MD, USA.
Posts: 540


I've seen this question asked and answered twenty different ways on this forum alone, with answers ranging from "you should put synth in at the start because the newer engines are machined to such standards that you don't need to worry about going a few thousand with dino" and "if synth wasn't good from the start the manufacturer wouldn't put them in new corvettes" to "you should wait X, Y or Z miles" for "A, B, or C reasons". If you do a search on the word synthetic you will probably find a lot of good opinions but no sure conclusion.

Only point I'm trying to make is there are many opinions on this. Personally, I went with Mobil 1 on my first change, at 2,500 miles.
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Old 06 Nov 2005, 11:19 pm
Fresh Cruiser
Join Date: Aug 2005
Location: .
Posts: 41

i would run it after the first change of 3k or in your case you should be fine. the reason is this on a new engine like say a race engine if you run synthetic oil right away you can run in to ring problem with them not seating right because the oil is too slippery. i have a big block chevy that is close to 900hp and when the engine gets new rings it runs on the dyno to seat the rings first then gets synthetic oil. your rings should be seated properly by now.
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Old 07 Nov 2005, 11:14 pm
Young Cruiser
Join Date: Nov 2005
Location: Puyallup, WA, USA.
Posts: 53

Thanks for the info. This weekend she goes in and gets the Mobil 1 change.
2005 Inferno Red Limited seeing way too much fun on the road ahead.
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Old 08 Nov 2005, 06:03 pm
Fanatic Cruiser
Join Date: Jan 2004
Location: louisville, kentucky, USA.
Posts: 658

Run it now...Do you think that the dodge viper and the corvette amoung other cars would not install Mobil 1 from the factory if it would hurt the engine....I dont think so...[xx(]
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Old 09 Nov 2005, 10:10 am
quicksilverdon's Avatar
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Join Date: Nov 2003
Location: Felton, Delaware
Posts: 20,501

Welcome, Chip. I changed mine to Mobil 1 at about 500 miles - as I did with my '02.[?]
"Anti-intellectualism has been a constant thread winding its way through our political and cultural life,
nurtured by the false notion that democracy means that 'my ignorance is just as good as your knowledge."
Isaac Asimov"

'05 Limited Turbo Lite, (Silver, of course)4-wheel ABS, Sunroof, Spoiler. Mods: E&G Classic grill, K&N FIPK, BTG duals, rear lowered 1.5", LED washer lights, $20 catch can, Aoogah horn, Weatherflectors, Sunroof Deflector, Fuzzy Dice, rear logo flames, rear pinstripe graphic, Gen3 Taillights, rear sway bar, hood struts, Strut bar.
Traded in '02 Silver Touring Edition w/87,000 miles
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