I’ve spent pretty much all day researching the forum on this topic. I’ve found some rather interesting threads all the way from 2003 up to now on whether or not people have used something like 10w40 in a 4.6 modular motor. It’s 50/50 and very subjective..
My vehicle:
- 2002 F150 with 226k
- Vehicle used daily in Northern California (Hot summers 100°+)
- Have used PUP 5W20 w/FL820s and Fram XG2 filters since ownership from October 2018 (purchased w/187k miles)
- Has always consumed 1 quart around the 3K mark of the strict 4k mile OCI
- Motor gets a little louder in the summer months (can audibly hear valves working more and 1.5’ish loss mpg)
A lot of threads on here speculated that 10w40 was just not correct for a 4.6 simply because it’s not what the manufacturer called for, however we all know that BITOG’ers have superior analytical evidence that says otherwise..
My question now is, would I create/develop an issue(s) with cold start rattling (cold here being 50°) if I move to 10w40? I like Pennzoil and don’t mind moving over to their high mileage flavor however they offer only 10w30 in full syn.. other options are:
- Mobil 1 HM Full Syn 10w40
- MaxLife 10w40 Syn Blend
Would like to hear what you all have to say
My vehicle:
- 2002 F150 with 226k
- Vehicle used daily in Northern California (Hot summers 100°+)
- Have used PUP 5W20 w/FL820s and Fram XG2 filters since ownership from October 2018 (purchased w/187k miles)
- Has always consumed 1 quart around the 3K mark of the strict 4k mile OCI
- Motor gets a little louder in the summer months (can audibly hear valves working more and 1.5’ish loss mpg)
A lot of threads on here speculated that 10w40 was just not correct for a 4.6 simply because it’s not what the manufacturer called for, however we all know that BITOG’ers have superior analytical evidence that says otherwise..
My question now is, would I create/develop an issue(s) with cold start rattling (cold here being 50°) if I move to 10w40? I like Pennzoil and don’t mind moving over to their high mileage flavor however they offer only 10w30 in full syn.. other options are:
- Mobil 1 HM Full Syn 10w40
- MaxLife 10w40 Syn Blend
Would like to hear what you all have to say