Hello
Yesterday I took my GT for oil change in a local shop. They guy put a full synthetic engine oil rated 5w-40. I know that the recommended oil is 5w-20. Will the 5w-40 harm the engine..? Should I change it immediately or use it..?
Thanks guys in Advance
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Black GT Conv. with Silver Stripes / Crimson Red Leather Interior
I would change it out to 5w20. I have heard that some put 5w30 in their car because the oil is a little thicker but I really don't think it's necessary. The engine is designed to run off of a thinner oil because of the better/closer tolerances inside the engine.
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2004 3.9L/auto
-Mac CAI, 73mm Mass Air
-Dual Flowmaster 40s, H pipe, 2.25 in pipe
-42% Underdrive Pulleys
-SCT Tuned
-4.10 Gears & Trac-lok
Thanks Guys... I will get it changed back to 5w20 today itself.. Cant imagine how stupid those guys at oil change are.. And even me who saw it only after they had already changed it..
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Black GT Conv. with Silver Stripes / Crimson Red Leather Interior
+1000 Why leave the single most important part of your engine maintenance to kids at some lube place. I am so picky about my oil that I have changed it about 10 times and I only have 16K on my car. I change it before every race and sometimes after. It's $18 for an FL820s and 6 quarts of 5W20 Moto Syn Blend. Cheap insurance as far as I'm concerned.
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It's better to burn out than to fade away - The Kurgan
+1000 Why leave the single most important part of your engine maintenance to kids at some lube place. I am so picky about my oil that I have changed it about 10 times and I only have 16K on my car. I change it before every race and sometimes after. It's $18 for an FL820s and 6 quarts of 5W20 Moto Syn Blend. Cheap insurance as far as I'm concerned.
Where do you find the oil at such a cheap price? Mine is close to $50 for the oil and filter.
Where do you find the oil at such a cheap price? Mine is close to $50 for the oil and filter.
Walmart sells a 5 qt jug of 5W20 Moto Syn Blend for like $12. The filter is about $4.
Edit: 2 things to watch out for when changing your oil....That 5 qt jug has that plastic seal under the cap and last time I changed it, part of that seal went down in the jug and I did not even notice it. Luckily it got caught in the funnel before it went down in the engine so watch out for that that. Also, always double check the seal on the filter to make sure it didn't stick to the engine. For me, it almost always stays on the engine after I remove the old filter from the block.
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It's better to burn out than to fade away - The Kurgan
if you want to run mobil 1, you should use the 0-20, as it's been reformulated to meet ford specs. syn oils are typically a bit thinner than their conventional counterparts, so the 0-20 m1 will be closer to the 5-20 moto than the 5-20 m1 is.
walmart by me also carries Royal Purple 5-w20. i use there oil with the mobile 1 filter. which may i say mobile 1 products are very pricey!!!!
jsut did a FRPP 4:10 instal yesterday and used Motocraft 75-w140 synthetic... didnt really want to go down that road b/c i wanted to run the royal purple! :/
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SCTx3Custom-Tune by JJ at Woodbine MotorSports, JLT CAI, Bassani SS AB, KOOKs Long Tubes, KOOKs O/R Xpipe, Livernois Stage 2 Heads, Comp Cams Stg 2 XFI SPR part#:127500, Livernois Lockouts, FRPP 39# Injectors, ARP Head Studs, Autolite HT0 SparkPlugs, FRPP 4.10, CHE LCAs, CHE Anti-squat, FRPP Springs, BMR Adj. Panhard Bar, GT500 Strut Mounts, Eibach Camber Bolts. Track Only:15x4&15x8s Rear-27'' x 10.5'' - 15" Mickey Thompson ET Street Radial, Fronts-26" x 6"-15" Mickey Thompson Sportsman S/R.
Engine Oil Change 
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