Which oil will work best for my car

[the.greg]

Hey guys,
I've had my 98 gt for a month now and I'm wanting to give it a tune up. I already replaced spark plugs and plug wires. Now I'm gunna do a oil change. I was planning on doin mobile 1 synthetic 10-30. I also heard good things about amsoil, but I cant find it at any of my local auto stores. My mustang is a 98 gt auto, with 138K miles on it. Do yall think this is a good oil choice for my car considering its high mileage. Thanks for the help, I'm new to working on my own car, and I appreciate the help.

 

[MustangChris]

moble 1 5W30 in winter 10W30 in summer always using a Napa Gold oil filter.

if you smoke out the exhaust, change over to a synthetic blend oil.

Amsoil makes a great product, but i personally prefer Moble 1 for motor oil and royal purple for everything else.

 

[the.greg]

Thanks for the reply. I'm going to do mobile 1 10w30 synthetic.

 

[GDTrumbo]

I'd do the 5W-30. Oil pressure at start-up is quicker and still has the shear strength of a 30 weight at operating temperature. It'll make a touch more power at the same time.
With the tolerances of these new engines, they don't want a slow "pump up". Make sure you get a correct filter with the anti-drainback feature, Motorcraft, WIX, etc. Some cheap filters don't have this.

GT

 

[GDawg]

I like Mobil 1 synthetic. But I use a K&N Oil Filter. It has the 1" nut built on it.

Change your fuel filter too and get a K&N Air filter if you don't already have one.

 

[94 DropTop]

I like the motorcraft blend oil, cheap and good shit. Here it is like 3-4 a quart compared to the 7-8 of mobile one.

 

[Matt94GT]

only mobil 1 for me, with a wix or motorcraft filter.

 

[fivepointnine]

what about using 40wt or 50wt, I saw Castrol syntech 5w50 today.....for the hot summer months down here in the south?

 

[ReplicaR]

I've been using 10-30W regular fossil oil. Car has 172k miles on it, and seems to be doing pretty good with it, so I'll stick with it.

 

[95BlkCobra]

im using mobil1 full syn 5w-30 and the car has 155,xxx miles on it and its running great!

 

[AaRoN]

There's no need to switch to 10w30 in the winter. 5w30 has a broad enough temperature protection rate. In fact, 5w30 will give you better protection.

 

[reduceallpain]

I've been using Valvoline non-synthetic 10w30 with a champ oil filter.......

Next oil change I'm using Valvoline 5w30 non-synthetic with a wix filter.. Actually it's in my car now waiting to be changd...

 

[brad94GT]

if u got the money royal purple im using synthetic mobil 1 right now

 

[MustangChris]

Moble 1 full synthetic 5W30

 

[AaRoN]

if u got the money royal purple im using synthetic mobil 1 right now

Royal Purple, FTR, uses the exact formula that Mobil 1 uses. Except, they say that they put in their own "special" additive.

 

[ram360]

mobil 1 synth here. This reminds me....the car is prob due!

 

[vermilion]

i use 10w30 syn blend or synthetic. i usually dont care for my stock engine. k&n or napa filter. now the new motor is going to be something else. :bootyshake:

 

[JerZeyStangz]

Amsoil 5w30. I always tossed around the idea of 10w30 but your robbing a "touch" of performance when you put that oil in. I've used 10w30 before a handful times, and used 5w30 almost all the time, just stick with 5w30, and it definitely helps with gas mileage/performance. Just go with the manufactuer's recommendations, unless you have serious leaks present, I wouldn't touch 10w30 if you have mod motor. Pushrods, that could be a different story.

 

[wytstang]

5w and 10w is only the cold temp weight, they both reach 30w when the engine reaches operating temps (hot). 5w will reach the top end slightly faster then 10w btw.

 

[Willis_98GT]

when i was npi i ran mobil 1 full synth 5/30

ever since my pi swap i've ran ams 5/30

my next change is coming up and dont really wanna spend the money on that oil again. so i'm considering something else.