5-30 syn oil or 5-20 syn

[Santara]

have a 98 e450 v 10 ,my book says 5-30 dino oil , but when i got this unit all said 5-20 syn so to make long story short went to 5-30 today& it seem to quite some lifter slap on accerlate All MC oil & filter

any input would be apprecited

when u look in book at wallyworld 97 says 5-20 99 same but for 98 its blank

[pkunk1]

'98 or "99 no diff. Ford spec was changed from 5-30 to 5-20 to try and gain a MPG advantage. I can see no diff. I buy either Motocraft oil from Walmart which is a semi-syn.

[Midniteoyl]

IMO, 5-20 is for hybrids... Stick to the 5-30.. Dino or synth, doesnt matter..

[W4MBG]

ford now says 5w20. thats what i run, mobil-1. i run 0w20 in my 2000 honda insight. pours like water. 140,000 miles so far on the honda.

[Midniteoyl]

The thing with oil weight is that the harder working and/or warmer your motor is, the thinner the oil gets and thus the lower your pressure gets.

[Santara]

Yey guys i know what u say am using syn blend fron MC, also live in s fla more heat dn here average,goin to try this 5-30 for a while see what gives,as book says same should,nt hurt any seals i would think

[bluepill]

I usually go with 20 when it's going to be below freezing for most of the time before the next change. Otherwise, 30 gives a bit more high temp. protection.

Not my idea, but based on the recommendations of a number of manufacturers.

[LVJ58]

When the v10's first came out the oil was spec's was 5w-30 then in late 2000 or early 2001 they revised the spec to 5w-20 for an infinitesimal increase in fuel mileage.

I continue to use Mobil 1 full synthetic 5w-30 in our 2000 coach which now has 74k miles and will keep doing so.

Safe travels

[She and I]

Quote:

Originally Posted by Santara have a 98 e450 v 10 ,my book says 5-30 dino oil , but when i got this unit all said 5-20 syn so to make long story short went to 5-30 today& it seem to quite some lifter slap on accerlate All MC oil & filter any input would be apprecited when u look in book at wallyworld 97 says 5-20 99 same but for 98 its blank

Hi Santara, I found this on this form and it has changed my thoughts on motor oil after reading it.

Motor Oil 103 - Bob is the Oil Guy
Richard