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09-12-2004, 08:56 PM | #31 | |
AF Newbie
Join Date: Sep 2004
Location: Greenacres, Florida
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Z-Max with every other oil change
Can anyone tell me if Z-max every 6000 miles with a 10w30 oil increase performance or save gas. I have a 2001 chevy silverado with a 4.8L. Z-Maz supposedly gives you a 150000 mile warranty. And they will fix your engine if anything will go wrong.
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09-13-2004, 11:19 PM | #32 | |
AF Regular
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Re: Safe to change to synthetic
Changing to synthetick at hy milage seems like a waste of time. Synthetics atrributes are that it prevents ware so using itearly in a engines life would be best. I started mine at 15,000 miles with mobile one and an upgraded filter. I run my oil a little longer, and i figure with everything working against these gen III engines it will need all the help it can get.
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09-14-2004, 02:13 PM | #33 | |
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Re: Safe to change to synthetic
Castrol..........good enough for John Force.......good enough for me
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09-14-2004, 06:48 PM | #34 | |
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Join Date: Apr 2004
Location: k, Rhode Island
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Burning Oil
My 87 F-150 with 350,000 still does not burn oil.
20W-50 with Motorcrafts filter. Now the internal parts have burnt oil all over it but it still does not burn oil. |
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09-14-2004, 11:12 PM | #35 | |
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Re: Safe to change to synthetic
brandon7777 dont use the z max or slick 50 they are to expensive. and you take it all out when you change the oil even the cheapest synthetic works better than z max and like some one stated earlier you can run synth oil 12 to 24 thousand miles. royal purple and amsoil are the top 2 and if a little does leak use some bars leaks, if the bars doesnt fix it something needs to be repaired engines dont consume much oil (minimal) but i would stay with one brand due to different detergents in the oils (synthetic or regular)
i use royal purple in my 81 chevy 350 and i love it, |
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10-25-2005, 02:40 PM | #36 | ||
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Re: Re: Safe to change to synthetic
Quote:
Like I said, I would definitely go with the manufacturer suggestion on oils because I am sure they knew what they were doing when they built the car. Furthermore, a heavier weight oil will cause your engine to possibly not start (or at least not start as easy) in cold winter temperatures. The lighter weight oil (5w-30) is the recommendation because it is good in extreme temperatures like winter cold. |
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