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Old 03-11-2011, 11:03 PM   #1
wizzle-stick
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Default new ej25 full rebuild oil question

im doing a full rebuild on my 02 ej25 and was wondering about what kind of oil to put in it once its together

when i say full rebuild, i mean new piston heads and bearings and vatting the block

i plan on doing synth blend, but was curious about the weight i should use. i have always used 10w40, but, during break in after the rebuild, what do you guys recommend?
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Old 03-11-2011, 11:28 PM   #2
williaty
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5w30 during break in and for the rest of the life of the engine unless you're getting it VERY hot or VERY cold.
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Old 03-12-2011, 01:21 AM   #3
rhino6303
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Make sure to use Dino oil and not synthetic or a blend during the break in.
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Old 03-13-2011, 11:42 PM   #4
wizzle-stick
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just out of curiosity, why dino oil on break in?

what drawbacks does using synthetic on a rebuild have?
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Old 03-13-2011, 11:44 PM   #5
williaty
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Quote:
Originally Posted by wizzle-stick View Post
just out of curiosity, why dino oil on break in?

what drawbacks does using synthetic on a rebuild have?
I have been able to find absolutely no scientific justification for not using synth for break in. I've found thousands of people advising against it for no justifiable reason. I break in on dino simply because it's cheaper and I'm doing 3 oil changes in the first 2,000mi. Then I switch to synth because of its better protection properties. Money no object, I'd run it from the start.
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Old 03-14-2011, 10:51 AM   #6
wizzle-stick
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ok cool. thats kinda what i thought but wanted to make sure.

Thanks for the info.
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