Need some help choosing an oil
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TECH Junkie
iTrader: (6)
Joined: May 2005
Posts: 3,185
Likes: 3
From: Highland, Indiana
Need some help choosing an oil Well my next oil change is close enough to think about changing what kind of oil I use.
I currently use Quaker State Higher Mileage formula 10W-40. Well recently a Wal-mart went up in the area making it only a few bucks more to put Mobil 1 10W-30 Synthetic in. First of all I know that Synthetic is better and you all swear by it etc. etc. but I do still have a few questions
One: Should I expect to see any sorts of issues changing from a natural oil to a synthetic oil assuming this motor has seen nothing but natural oils through its entire life ? Is it still a good idea knowing that fact (~85k miles on it by the next oil change)
Two: I have heard conflicting things about the life span of synthetic oil, I have heard that synthetic will break down to essentially water if you dont change it every 3,000 miles exactly but I have also heard of people running synthetic to 8,000 miles without changing it. Which is true?
Please dont tell me to search because I have and still want more info so thanks alot in advance guys!
I currently use Quaker State Higher Mileage formula 10W-40. Well recently a Wal-mart went up in the area making it only a few bucks more to put Mobil 1 10W-30 Synthetic in. First of all I know that Synthetic is better and you all swear by it etc. etc. but I do still have a few questions
One: Should I expect to see any sorts of issues changing from a natural oil to a synthetic oil assuming this motor has seen nothing but natural oils through its entire life ? Is it still a good idea knowing that fact (~85k miles on it by the next oil change)
Two: I have heard conflicting things about the life span of synthetic oil, I have heard that synthetic will break down to essentially water if you dont change it every 3,000 miles exactly but I have also heard of people running synthetic to 8,000 miles without changing it. Which is true?
Please dont tell me to search because I have and still want more info so thanks alot in advance guys!
TECH Enthusiast
Joined: Jan 2004
Posts: 611
Likes: 0
From: Fairfield, CA
Changing from conventional to synthetic is always okay, it is not okay to switch from sythetic back to conventional, however. I run Mobil 1 10W-30 with 90K on her and have never had a problem. I change my oil every 6K. I also buy it at Wal-Mart (they sell the 5 Quart container for like $25), so I pick up an extra quart and my oil filter at AutoZone for $10.99.
TECH Enthusiast
Joined: Mar 2004
Posts: 647
Likes: 0
From: Jupiter/Gainesville, Fl. The other "U"
id go with M1 5W-40. I just switched from the 10W-30 and have had way better oil pressure. You can find it at Wal-mart in the 5 qt. jugs for like 21-22$. I use a WIX filter from Bennet auto supply thats like 4.80.
TECH Enthusiast
Joined: Mar 2004
Posts: 647
Likes: 0
From: Jupiter/Gainesville, Fl. The other "U"
What would you consider better oil pressure?
With the 5W-40 it stays between 50-55 psi. Rarely goes below.
