5w50 Synthetic
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New User
Joined: May 2003
Posts: 20
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From: Philadelphia, PA
5w50 Synthetic
I have been using 5w50 Sybthetic in my 92 Bronco for three years (since I bought it), I used the same in my 87 Bronco. I have experienced no problems thus far. Is there any reason I should not use this viscosity of oil.
Post Fiend
Joined: Jun 2001
Posts: 5,228
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From: Running Springs CA
5w50 Synthetic
Castrol Syntec is the only popular 5W-50 that I know of. Is that what you are using? It is a Group III based oil, but does carry API CF/SL and ACEA A3 ratings. The only "downside" is that it is not "Energy Conserving". In the Syntec line, I would probably use the 10W-40, but I see no problem with the 5W-50 as long as you don't extend drain intervals beyond "normal service" intervals of six months or 6000 miles.
Jim
Jim
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New User
Joined: May 2003
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From: Philadelphia, PA
5w50 Synthetic
I am using castrol full synthetic. I change the oil every 2,500 - 2,700 miles (I do alot of city driving). Never had any problems, but I was told that a 50 weight oil is bad for the pump and pickups because it is too thick to flow.
FTE Leadership Emeritus
Joined: Sep 2000
Posts: 7,298
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From: Southern California
5w50 Synthetic
Lubricants listed as "Energy Conserving" by the API create less fluid friction. Less friction, less heat and energy required to overcome excess friction. Hence better fuel economy. The fuel economy increase may be barely noticable. But if you buy into it, the whole point of selecting a good oil is to reduce heat and friction. The best oil may actually be the lowest viscosity recommended for the expected temperature range. But most of us feel safer going with the highest viscosity for the same temperature range.
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