Lately the weather at night & mornings has been in the teens & low 20's! Yeah mighty cold with a wind chill of 5-6 degrees! BUUURRRR! I leave for work at 0610Hrs, & it's freezing! Since my 2007's first oil change at 3K, It has been running exclusively on Mobil 1 5w20, I noticed a significant quietness upon startup since the switch since new. Even in warmer temps! I have to say, that in the recent cold temps that the 5.43v has been starting up in, the motor is silent at startup! The SOHC mod motors need fast lubrication to the top end, to remain quiet, & I have to say that I am amazed how fast the synthetic does the job in the frigid temps! I don't want to sound like a commercial, however with all the threads I have read on loud motors on startup, take note on my cold start experience!..............

 

The better flow characteristics of synthetic oil in freezing temps isn't new information. That's been the major selling point for years. What the majority of people don't realize is it still needs to be changed at around the same intervals as conventional oil. Oil's main jobs are to keep the moving parts clean, cool, and lubricated. Synthetics pick up the same amount of dirt over 3-5K as regular oil. It makes people feel better to think they can drive longer because they paid $3-$6 a quart for syn oil but it's just not the case. The main benefits of using synthetics are better flow in cold and better protection in summer heat.

 

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It ceases to amaze me that some auto manufacturers and service center tell the customers to change their oil at 5k or 7.5k and sometimes 10k if they are running synthetic. I think I'll stick to my 3k oil changes and know my engine will last.

 

0w-20 would seem to be the best for your climate.

 

Plenty of good synthetic oils provide excellent lubrication for your engine for 15000 miles / 1 year, but you will have to use an oil filter designed for extended oil change intervals.

 

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It ceases to amaze me that some auto manufacturers and service center tell the customers to change their oil at 5k or 7.5k and sometimes 10k if they are running synthetic. I think I'll stick to my 3k oil changes and know my engine will last. [/QUOT-3k oil changes = more $ for the industry-wifes 02 neon ,oil changed once a year with amsoil 0w30-amsoil & ea filter-just turned 115k miles-just changed oil; and filter for 6th time- zero issues-thers a member on dodge trucks .org-93 dakota -original 3.9l, amsoil once a year with amsoil filter and bypass filter-600k miles even todays petro oils will last more than 3 k miles-analysis support this

 

This is all I understood out of your post. Conventional oil will go longer then 3000 miles, the weak link is the filter. The majority of filters aren't designed to go much beyond 5000 miles before they're replaced. Oil doesn't wear out, it will lubricate indefinitely as long as it can be kept clean. The additives in the oil dissipate over time. These two things together are the reason regular changes are necessary.

 

risupercrewman: I just want you to know that I woke up in nice conditioned air. When I walked out the door and the mugginess hit me. It was nice all day, but now I'm about to turn down the a/c again.

My truck will start fine even with mapel syrup tomorrow.

 

It's snowing & Sleeting here now! I would not wish to reside in a Muggy Enviroment all year round.......come morning, I'll do something you won't be doing anytime soon.......dounuts in the snow!!!.........

 

Its not quite muggy all the year. When it actually gets cold (25-30), its so damp that you cant ever really feel warm.

Watch out for hydrants in the snow when doing those donuts.

 

I agree for the most part with what others have mentioned. Mobil 1 and 5k intervals would be about ideal. Ford specs 5k intervals for the semi synthetic, no reason a full synthetic cant go the same. I swapped to mobil 1 recently and have noticed less noise also