I am curious what most of you guys run in your Fords. I run 10W-30 in my Cobra (I only drive it in the summer and when I do I drive it HARD so I like the thicker oil), but the manual for the truck says 5W-30. Is there an advantage to using the thicker oil? I live in Colorado so I guess I have more peace of mind when I start the engine on those cold mornings with the 5W-30, but when I pour it in the engine it just looks way too thin!

What have your experiences been? Thanks in advance for the replies.......

 

Maybe you have bearing tolerances designed for 5w30 and the use of any heavier oil is starving your components and causing premature wear. I bet even if you check the owners manual for a new mustang GT it will be 5w30 for all driving conditions.

Once your car is warmed up to operating temperature the differece between 5w and 10w is nill. They both only thin down to a 30 weight oil.

If you are wanting better protection, go with a synthetic in the 5w30 with a higher film strenth you will get better startup protection. A higher High temp High shear protection. And less oxidation than conventional.


In all honesty I use a 0w30 and get better temperature numbers than a conventional 10w30!!!!


------------------
Lube-Direct


New Lubrication Forums

 

Most 5w-30's use a thinner base oil than the 10w-30's. The 5w-30 will be at the low SAE 30 and the 10w-30 will be at the upper 2/3's of an SAE 30. The 5w-30 will pump much better because of the thinner base oil and W number.

Sincerely, Kevin

 

If there are concerns about engine longetivity on 5W30, there are many of us with mileage that is beginning to add up without any problems running 5w30.

------------------
1997 F150 XLT, Flareside , Moonlight Blue, 4x2, SC, Auto, 4.6L, 3:08, Cargo Cover by Century, Blue Oval reciever hitch plug, Driver Design bug deflector, 235/70/16 Firestone Wilderness AT's, sliding rear window, captain's chairs, Valvoline Durablend Oil, Purolator Pure One Oil Filter, and 107,000 miles and counting!

 

Before starting new threads, please look in earlier topics (where it says "Show topics older than 30 days" - click on "Go"). If you had done this, you would have found this one, which is not very old and has plenty of posts to answer your question: https://www.f150online.com/f150board...ML/002058.html

Next time...

------------------
Black 2000 SC short-box XLT. 4.2V-6, 5-speed, 3.55 limited-slip. CD, remote entry, factory side steps, FORD box liner.

My third F-series: '73 F-100 Custom 240-cube 3-speed, '98 F-150 XL-SC 4.2 5-speed, and '00 F-150 XLT-SC 4.2 5-speed. GREAT trucks!



[This message has been edited by Shifter (edited 08-29-2000).]