02-20-2006, 07:08 PM
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#1
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AF Regular
Join Date: Jan 2006
Location: Miami, Florida
Posts: 226
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What oil to use
Well i have a 94 formula with a rebuilt engine and about 27k miles on it. When i bought it they told me they were using none sinthetic 10-40 oil. The same day i changed the oil and been using mobil 1 10-30. Lately I've heard a mix of good and bad things about Mobil 1. What is the best oil i can put in my baby?
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02-20-2006, 07:18 PM
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#2
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Firebird Guy
Join Date: Dec 2004
Location: Westminster, Colorado
Posts: 6,590
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Re: What oil to use
You want the best?? Like 8-9 bucks a quart? Redline, Amsoil, Royal Purple
Okay...how many miles on the new motor with non-synthetic oil?
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1999 Pontiac Trans Am WS.6 #1747
Stock'ish'
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02-20-2006, 07:28 PM
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#3
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AF Regular
Join Date: Jan 2006
Location: Miami, Florida
Posts: 226
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Re: What oil to use
most miles were not synthetic... like 24k
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02-20-2006, 08:01 PM
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#4
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Firebird Guy
Join Date: Dec 2004
Location: Westminster, Colorado
Posts: 6,590
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Re: What oil to use
Okay.
Good thing. Best to run a motor on the cheaper oil for a while before switching to synthetics.
Mobil 1 is great oil. That is what I use.
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1999 Pontiac Trans Am WS.6 #1747
Stock'ish'
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02-20-2006, 08:07 PM
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#5
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AF Enthusiast
Join Date: Nov 2005
Location: Roanoke, Virginia
Posts: 271
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Re: What oil to use
I use mobil 5K in my car. 1 question Luos... when the guy changed the oil, he said i hafta run 10W-30 in the winter and 5W-30 in the summer. Do you do the same thing???
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02-20-2006, 08:12 PM
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#6
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Firebird Guy
Join Date: Dec 2004
Location: Westminster, Colorado
Posts: 6,590
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Re: What oil to use
Nope.
I run 5w-30 year round in both cars.
Granted, the T/A never leaves the garage if the weather is cooler than 45-50 degrees.
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1999 Pontiac Trans Am WS.6 #1747
Stock'ish'
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02-20-2006, 08:23 PM
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#7
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AF Enthusiast
Join Date: Nov 2004
Location: Port Saint Lucie, Florida
Posts: 820
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Re: What oil to use
Quote:
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Originally Posted by 1FASTws6
I use mobil 5K in my car. 1 question Luos... when the guy changed the oil, he said i hafta run 10W-30 in the winter and 5W-30 in the summer. Do you do the same thing???
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Wouldn't it be the other way around? Either way, I would run the Mobil 1 5w30 all year as well...
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02-21-2006, 02:08 AM
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#8
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AF Regular
Join Date: Jan 2006
Location: Miami, Florida
Posts: 226
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Re: What oil to use
Lous you said you run 5-30... is that what u recommend for me pr should stick to 10-30 remember approaching 30k miles on a rebuilt...?
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02-21-2006, 02:14 AM
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#9
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AF Enthusiast
Join Date: Oct 2004
Location: Greenville, South Carolina
Posts: 500
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Re: What oil to use
I use Castrol syntec 10W30 year round ,But I am in a warmer region .Per the owners manual . Rob
__________________
2000 Trans Am six speed Blackbird .Fast enough stock!
2005 Grand Prix.
2002 Silverado 4x4 , 5.3 Vortec . Lifted ,Pumped,Humped,Thumped!
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02-21-2006, 09:03 AM
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#10
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AF Enthusiast
Join Date: May 2005
Location: concord, New Hampshire
Posts: 2,026
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Re: What oil to use
In the grand am I run castrol syntec 20-50 in the summer and 10-30 in the winter. The camaro gets 5-30 mobil 1 but is only out late april to mid october anyway.
__________________
Rusting out Honda Civic $900
Fart cannon muffler: $300
Assorted stickers advertising products you'll never own: $50
Having your @ss handed to you by a brick shaped suv: Priceless.
Yup, I own the suv.
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02-21-2006, 11:50 AM
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#11
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AF Enthusiast
Join Date: Aug 2005
Location: Columbia, Illinois
Posts: 2,868
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Re: What oil to use
thing about castrol syntec it is not a full syntec like mobil 1, and wouldent 10w30 in a new motor hurt the rings? Would it be to thick? I have a 305 with 120,000 should i run 10 or 5, 30?
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95 Z71 Silverado 4x4 ext. cab
Mods- Flowmaster Exhaust,Intake
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02-21-2006, 12:57 PM
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#12
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Firebird Guy
Join Date: Dec 2004
Location: Westminster, Colorado
Posts: 6,590
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Re: What oil to use
If you have over 75,000 on a motor using conventional oils, don't change to synthetic. Some do without problems, others start burning oil.
I use Mobil 1 5w-30 year round. And we get extremes in temperature here. Just last weekend we set new record lows (below zero). This summer...well over 95 degrees for several days.
__________________
1999 Pontiac Trans Am WS.6 #1747
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02-21-2006, 03:50 PM
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#13
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AF Enthusiast
Join Date: Aug 2005
Location: Columbia, Illinois
Posts: 2,868
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Re: What oil to use
why would it start burning if i go with synthetic?
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95 Z71 Silverado 4x4 ext. cab
Mods- Flowmaster Exhaust,Intake
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02-21-2006, 06:13 PM
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#14
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Firebird Guy
Join Date: Dec 2004
Location: Westminster, Colorado
Posts: 6,590
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Re: What oil to use
Rings are used to the conventional. They can't handle the much more slick synthetic. The rings can start to allow a little oil to blow by...thus burning oil.
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1999 Pontiac Trans Am WS.6 #1747
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02-21-2006, 06:21 PM
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#15
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AF Regular
Join Date: Jan 2006
Location: Miami, Florida
Posts: 226
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Re: What oil to use
OK im still a little confused... I live down in Miami Where temperature is year round at 80 with alot of humidity. Should i go 5-30 or 10-30 Mobil 1. Remember approaching 30k mile on rebuilt engine that has mostly used 10-40 non synthetic oil
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