Step up a weight as engine ages?

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Using 5w20 for almost 94000 miles. Using syntec 5w20 now wondering about stepping up to 5w30. Necessary or no for aging engine? I used QSUD 5w30 last summer and noticed no difference in mpg.
 
Why?

Is the engine burning oil, knocking, or doing anything out of the ordinary? If not I'd save the 5W30 for if/when you have a problem.
 
usually there is not a really big bifference between the 5w-20 and the 5w30 to make a big difference in mpgs, a tenth of a mpg or so.
 
It's a 2005 ford focus st. 2.3 4 cyl and it's not burning any earl yet.
 
No reason to change anything you're currently doing with your oil.

Example: I own a 1998 year model Chevy (owned since 1998) with 331,000 miles that was factory spec'd for 5w30 and I used 5w30 from day 1 and it still runs as good as new.

Stay with your 5w-20.
 
Originally Posted By: JCM35
It's a 2005 ford focus st. 2.3 4 cyl and it's not burning any earl yet.


Seems the answer to you rquestion is "no"
Civics can run 5w30 their whole life, the ones before 2001 especially. (Ive had four Civics, they all ran forever until SUVs crashed into the,.)
frown.gif


Your car? ... you are thinking "down the road," i see.

Just dont switch to Synthetics keep using Motorcraft oil and you should be ok
smile.gif


.. ami right? Board? Am i right?

Oh, and im not sure why someone mentioned a Honda Civic, he has a Ford.
 
i have a friend with over 200k on his honda. gtx 5/20 every oil change. it uses no oil between changes and makes no noises. i have tried to get him to switch to gtx hm but he sees no need because the engine is running great.

i have another friend with a dodge truck with 350k on it. he has been running gtx 20/50 since it hit 200k. it uses no oil and runs great. i believe he will see 500k out of it.

my opinion is as an engine wears clearances increase and a thicker oil can "take up slack" my truck is spec for 5/20 and i run 5w30 because it has 140k on it. when i hit 240k i will switch to x/40 even if it doesnt seem to need it.
 
Nope - you're good to go. Using Syntec (or any modern, quality oil) in the the weight specified your by your owners manual for the OCI in the owners manual and you are in great shape.
 
Originally Posted By: electrolover
i have a friend with over 200k on his honda. gtx 5/20 every oil change. it uses no oil between changes and makes no noises. i have tried to get him to switch to gtx hm but he sees no need because the engine is running great.

i have another friend with a dodge truck with 350k on it. he has been running gtx 20/50 since it hit 200k. it uses no oil and runs great. i believe he will see 500k out of it.

my opinion is as an engine wears clearances increase and a thicker oil can "take up slack" my truck is spec for 5/20 and i run 5w30 because it has 140k on it. when i hit 240k i will switch to x/40 even if it doesnt seem to need it.


Good call, electrolover. Ive gone to 10W-40 mre fr peace of min dthan anything else. Also reports of other owners on this grade in this car, and i agree.
 
I only step up a weight if the engine uses oil. I will never hesitate to go to a thicker weight if oil useage is a issue and it always works for me. The thicker/thin oil difference is way over rated, as far as cold starts and tollerances go.
 
Not neccessary, and thicker oils sometimes actually increase oil consumption.

That said, most 5w20s and 5w30s are not all that drastically different.
 
Originally Posted By: qdeezie
No reason to change anything you're currently doing with your oil.

Example: I own a 1998 year model Chevy (owned since 1998) with 331,000 miles that was factory spec'd for 5w30 and I used 5w30 from day 1 and it still runs as good as new.

Stay with your 5w-20.


You must be mistaken, that car isn't a Chevy, it is a HONDA
 
Originally Posted By: goodtimes
Originally Posted By: qdeezie
No reason to change anything you're currently doing with your oil.

Example: I own a 1998 year model Chevy (owned since 1998) with 331,000 miles that was factory spec'd for 5w30 and I used 5w30 from day 1 and it still runs as good as new.

Stay with your 5w-20.


You must be mistaken, that car isn't a Chevy, it is a HONDA


I got a Chevy...

frown.gif
 
194K miles here. Still use 5w20 with perfect results. If there is a reason to go thicker, I will. But really see no reason too. Maybe if the oil pressure starts dropping as the car gets older. That would be a valid reason to go a little thicker.
 
The viscosity of the oil must relate to the clearances in the bearings. If wear causes larger clearances, yes, increase the oil viscosity until it is time to renew the bearings or junk the car. Modern engines show so little wear that changing the viscosity is rarely needed.

Oil getting past the oil control ring and being burned is somewhat different. Again, very little wear on the cylinder wall or the rings in modern engines with modern oils. More likely is that the rings are stuck with carbon and not doing their job. Heavier oil might help and might not. Chemical cleaning of the ring pack might work. Check the Oil Additives sub-forum.
 
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