whats the best oil to use

[FordTempoGuy]

fresh rebuilt 5.0? gonna start driving it and want to put good oil in it instead of the wal mart brand crap thats in there now that i used for initial run time. gonna use good oil and filter now.

[chitownvic]

Filter wise you can't beat a stock Motorcraft.FL1A if you want to spend a littke more get a Wix racing filter.. Or if you can find them the FL1A Race filter.. Being that it's a fresh motor I'd go with synthetic. Ams oil is the best and the price shoes it! Im partial to Valvoline products but any name brand synthetic will work


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[GM_Guy]

Any name brand oil.

Have you run it yet? Initial run in on regular oil (10w30). Change it & filter. Fresh fill of regular 10w30, run it for a couple hundred miles, change oil & filter again. Refill with regular 10w30. Change oil & filter after a couple thousand miles with regular 10w30 again. Run that for a couple more 3k changes and switch to synthetic. If you are really in-tune with hearing how your motor behaves, during the initial few thousand mile break in period, you will notice a day where the engine likes to rev much freeer than before. When you get to that point, you're good to go to synthetic.

I also support the Nascar breakin method. Take it as quick as you can out into the sticks, or empty interstate early in the morning. Accelerate briskly to 60 or 70mph, let the car coast down to 20-30 mph, get back on the throttle hard and take it back up to 60-70mph, let it coast down to 20-30 again, repeat 10 or so times. Then drive it, giving it the standard break in oil changes. Makes life so much easier than trying to baby a motor for the first few thousand miles. I've done both. I'll stick with the Nascar method as I have noticed no difference long term.

Alex.

[FordTempoGuy]

yea i've run the engine a few hours on the crap walmart oil thats in there. just haven't driven it because plates are expired, renewing them with this fridays paycheck.

[Mike_Windsor]

As a point of general interest, is there much of a different between 5W30 and 10W30 for our cars?

[sly]

10w30 for warmer areas... 5w30 for frozen areas??

[Mike_Windsor]

Right so I should be rotating between 10W and 5W...

[HiFiMerc]

I've been running 5W-30 in the box. No loss of oil pressure, and quieter starts. It has a tick when you first start it, the colder it is, the longer it ticks. That tick goes away much, much faster with 5W-30.

[gadget73]

I actually run almost exclusively WalFart oil in my stuff. I won't pretend it superior to anything, but it meets all the proper ratings. I change things often enough that it really doesn't matter what I put in there as long as it meets the ratings.

[GM_Guy]

5w vs 10w depends on your engine. Mine eats 5w30 when driving on the highway. 10w30 doesn't use any oil under the same conditions.

Alex.

[amoss2]

Motorcraft FL1HP racing oil filter ! About $8.50-12.00 each.

[miamibob]

Have used everything from 10W 30 to 5W 20 in my '87 with no noticeable difference. Ran MOBIL 1 almost since it was new but now, not being able to do the oil changes myself, the dealer uses 5W 20. No funny noises so hope this thin oil will be ok!

[dmccaig]

Any premium 10/30 ch @2500 for the last 270 k. Idles at 25

[mobydick]

5w30 and 10w30 are the same viscosity at operating temperature. One oil being "thicker" or "thinner" than another is fud. At operating temp both behave as 30 weight oils. At room temperature 5w30 is "thinner" than 10w30 which can allow for the oil to reach vital areas faster, especially in colder climates. But otherwise at operating temp they behave the same way.

Fwiw I run mobil 1 high mileage in my car as it's nearing 200k miles. I use a FL1A filter; for the money you can't beat it.

[murphmobile2]

Can't go wrong with Motorcraft 5W or 10W30 motor oil with a Motorcraft FL1A oil filter. I personally ran Mobil1 10W30 with a FL1A or a Bosch oil filter.