Ive been using motorcraft 5w30 in my truck and was thinking about switching to 10w30 since it gets pretty warm here in the summer and I was told its better to have a thicker oil if its warmer temps? I dont really know anything about it what are your opinions and what is your take on this higher milege oil is it a marketing host or is it for real? My truck is ticking close to 100k and was wondering if I should use it or not Motorcraft doesnt have it so if I switch what should I use? Id appreciate the help.

 

I've been using Castrol GTX 10W30 for 30000 miles, but I just switched back to Motorcraft 5W20 (Ford recommended & synthetic). For some good into on oil check out: "http://www.bobistheoilguy.com/" More info' than you may ever be able to use, but very informative.

 

If your not using synthetic and you switch to it do you have to do anthing special?

 

ive heard you need to flush it out if you want to go to synthetic, not really sure though.

 

i use 5w20 Motorcraft in my 2003 5.4 year round,

all my other rides I use reg oil with 1 Qt. of SYNTHETIC added to it to give it a blend, this way i know how much of a blend i have where as when you buy (syn blend) you have know idea what the ratio is of syn

Later ,,

Mark

 

The Motorcraft 5W-20 is NOT synthetic, it's a blend. It does hold up well in used oil analysis. A lot of F150 owners are running M1 5W-30 for 5K and not having any problems. Would recommend that you use the Motorcraft filter, FL820S, these are good filters and made by Purolator.

 

Ford flip flops on the manufacturer of the MC filters. It's either made by Purolator or sometimes Champion Labs.

 

I have been useing Mobil 1 0w20 for about the last 10000 miles i do get a 1 mpg increase over 5w30, the 0w20 from what mobil said is 5w20 compatible, but now the local walmart stop carring it.

 

I have an 03 FX4 that I bought new a year ago. At that time I found a post on here that spoke about Mobil 1 10w-30 Full synthetic being a great oil for the 5.4L's. I used the same oil in my 99z28 LS-1 before I traded it for F150 and in both vehicles without any problems. I live is central florida between Tampa and Orlando so it gets fairly warm down here. My truck has 25k on it and I have been using that oil since my first oil change at 1500 miles. No complaints and I will continue to use it as I am a believer in the Mobil 1 synthetic product. I cannot speak about the quality versus other vescocities and brands all I can say is it works for me.....Gook Luck......

 

I use Motorcraft 5W20 & Motorcraft filter.
Change it every 3 thou.
My dealer offers lifetime FREE oil changes.

 

I have used M1 for years and have had no problems. As for filters, K&N has less than 3 PSI drop, better than most. I read it on a post from the thunderbird, cougar club of america web site. Simply, if you change your oil regularly, you should have no problem assuming you use a good quality oil.

 

I have found success and better performance since switching from Mobil 1 Oil & Filter to Royal Purple 5W20 w/ K&N oil filter. Costs a bit more - yet noticeable improvement

 

You are not getting a thicker summer oil with this switch. They are both "30".